diff --git a/_includes/manuals/3.13/1.2_release_notes.md b/_includes/manuals/3.13/1.2_release_notes.md
index 801461260d..bdff1e9874 100644
--- a/_includes/manuals/3.13/1.2_release_notes.md
+++ b/_includes/manuals/3.13/1.2_release_notes.md
@@ -8,6 +8,15 @@ Foreman now supports running on Debian 12 (Bookworm).
 
 ### Upgrade warnings
 
+#### Running Foreman on Enterprise Linux 8 is not supported anymore
+
+Running Foreman on Enterprise Linux 8 has been deprecated since 3.11 and removed in this release.
+
+Note this is for running Foreman itself.
+Clients will remain supported.
+
+For more details and discussion, see https://community.theforeman.org/t/drop-support-for-running-on-el8-with-foreman-3-13/38083.
+
 #### Running Foreman on Ubuntu 20.04 (Focal) is not supported anymore
 
 Foreman supports running on Ubuntu 22.04 LTS (Jammy Jellyfish) since 3.11.
diff --git a/_includes/manuals/3.13/2.1_quickstart_installation.md b/_includes/manuals/3.13/2.1_quickstart_installation.md
index 1532a6f767..bcd1d58028 100644
--- a/_includes/manuals/3.13/2.1_quickstart_installation.md
+++ b/_includes/manuals/3.13/2.1_quickstart_installation.md
@@ -24,7 +24,6 @@ function update_quickstart_os(select) {
 To provide specific installation instructions, please select your operating system:
 <select onChange="update_quickstart_os(this);">
   <option value="none">-- select operating system --</option>
-  <option value="el8">Enterprise Linux 8</option>
   <option value="el9">Enterprise Linux 9</option>
   <option value="debian11">Debian 11 (Bullseye)</option>
   <option value="debian12">Debian 12 (Bookworm)</option>
@@ -37,16 +36,6 @@ To provide specific installation instructions, please select your operating syst
   <i>No operating system selected.</i>
 </div>
 
-<div class="quickstart_os quickstart_os_el8">
-  <p>
-    Enable Puppet's 8.x repository:
-  </p>
-
-{% highlight bash %}
-sudo dnf -y install https://yum.puppet.com/puppet8-release-el-8.noarch.rpm
-{% endhighlight %}
-</div>
-
 <div class="quickstart_os quickstart_os_el9">
   <p>
     Enable Puppet's 8.x repository:
@@ -57,14 +46,6 @@ sudo dnf -y install https://yum.puppet.com/puppet8-release-el-9.noarch.rpm
 {% endhighlight %}
 </div>
 
-<div class="quickstart_os quickstart_os_el8">
-  <p>Enable the Foreman repositories:</p>
-
-{% highlight bash %}
-sudo dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el8/x86_64/foreman-release.rpm
-{% endhighlight %}
-</div>
-
 <div class="quickstart_os quickstart_os_el9">
   <p>Enable the Foreman repositories:</p>
 
@@ -73,14 +54,6 @@ sudo dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el9/x86
 {% endhighlight %}
 </div>
 
-<div class="quickstart_os quickstart_os_el8">
-  <p>Enable the Foreman module:</p>
-
-{% highlight bash %}
-sudo dnf -y module enable foreman:el8
-{% endhighlight %}
-</div>
-
 <div class="quickstart_os quickstart_os_debian11">
   <p>
     Enable Puppet's 8.x repository:
@@ -147,7 +120,7 @@ echo "deb http://deb.theforeman.org/ plugins {{page.version}}" | sudo tee -a /et
   <i>No operating system selected.</i>
 </div>
 
-<div class="quickstart_os quickstart_os_el8 quickstart_os_el9">
+<div class="quickstart_os quickstart_os_el9">
 {% highlight bash %}
 sudo dnf -y install foreman-installer
 {% endhighlight %}
@@ -167,7 +140,7 @@ sudo apt-get update && sudo apt-get -y install foreman-installer
 
 The installation run is non-interactive, but the configuration can be customized by supplying any of the options listed in `foreman-installer --help`, or by running `foreman-installer -i` for interactive mode.  More examples are given in the [Installation Options](/manuals/{{page.version}}/index.html#3.2.2InstallerOptions) section.  Adding `-v` will disable the progress bar and display all changes.  To run the installer, execute:
 
-<div class="quickstart_os quickstart_os_none quickstart_os_debian11 quickstart_os_debian12 quickstart_os_ubuntu2204 quickstart_os_el8 quickstart_os_el9">
+<div class="quickstart_os quickstart_os_none quickstart_os_debian11 quickstart_os_debian12 quickstart_os_ubuntu2204 quickstart_os_el9">
 {% highlight bash %}
 sudo foreman-installer
 {% endhighlight %}
diff --git a/_includes/manuals/3.13/2_quickstart_guide.md b/_includes/manuals/3.13/2_quickstart_guide.md
index e0e4c16970..0a46de29b0 100644
--- a/_includes/manuals/3.13/2_quickstart_guide.md
+++ b/_includes/manuals/3.13/2_quickstart_guide.md
@@ -7,7 +7,6 @@ The installation will require 4GB of memory, see [System Requirements](manuals/{
 
 #### Supported platforms
 
-* Enterprise Linux 8, x86_64
 * Enterprise Linux 9, x86_64
 * Debian 11 (Bullseye), amd64
 * Debian 12 (Bookworm), amd64
diff --git a/_includes/manuals/3.13/3.1.1_supported_platforms.md b/_includes/manuals/3.13/3.1.1_supported_platforms.md
index 691ec44186..323cd08ac8 100644
--- a/_includes/manuals/3.13/3.1.1_supported_platforms.md
+++ b/_includes/manuals/3.13/3.1.1_supported_platforms.md
@@ -1,8 +1,5 @@
 The following operating systems are supported by the installer, have packages and are tested for deploying Foreman:
 
-* Red Hat Enterprise Linux 8
-  * Architectures: x86_64 only
-  * Apply all SELinux-related errata.
 * Red Hat Enterprise Linux 9
   * Architectures: x86_64 only
   * Apply all SELinux-related errata.
diff --git a/_includes/manuals/3.13/3.3.1_rpm_packages.md b/_includes/manuals/3.13/3.3.1_rpm_packages.md
index 9a2165ae7b..192a1b2801 100644
--- a/_includes/manuals/3.13/3.3.1_rpm_packages.md
+++ b/_includes/manuals/3.13/3.3.1_rpm_packages.md
@@ -1,7 +1,6 @@
 
 Foreman is packaged for the following RPM based distributions:
 
-* RHEL and derivatives, version 8
 * RHEL and derivatives, version 9
 
 **Note:** The RPM packages are not tested on Rocky Linux or Oracle Linux. The Foreman installation on Rocky Linux or Oracle Linux may or may not work.
@@ -26,11 +25,6 @@ Under each repo are directories for each distribution, then each architecture.
 
 To set up the repository, foreman-release packages are provided which add a repo definition to `/etc/yum.repos.d`. Install the release RPM and enable the module:
 
-    # EL8
-    dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el8/x86_64/foreman-release.rpm
-    dnf -y module enable foreman:el8
-    
-    # EL9
     dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el9/x86_64/foreman-release.rpm
 
 ### Signing
diff --git a/_includes/manuals/3.13/3.6_upgrade.md b/_includes/manuals/3.13/3.6_upgrade.md
index a7128ad4df..748f84d29a 100644
--- a/_includes/manuals/3.13/3.6_upgrade.md
+++ b/_includes/manuals/3.13/3.6_upgrade.md
@@ -35,7 +35,6 @@ $(document).ready(function() {
 To provide specific installation instructions, please select your operating system:
 <select id="upgrade_os" onChange="update_upgrade_os(this);">
   <option value="none">-- select operating system --</option>
-  <option value="el8">Red Hat Enterprise Linux 8</option>
   <option value="el9">CentOS Stream 9 / Red Hat Enterprise Linux 9</option>
   <option value="debian11">Debian 11 (Bullseye)</option>
   <option value="debian12">Debian 12 (Bookworm)</option>
@@ -58,7 +57,7 @@ Before proceeding, it is necessary to shutdown the Foreman instance.
 <div class="upgrade_os upgrade_os_none">
   <i>No operating system selected.</i>
 </div>
-<div class="upgrade_os upgrade_os_el8 upgrade_os_el9">
+<div class="upgrade_os upgrade_os_el9">
 {% highlight bash %}
 systemctl stop httpd foreman.service foreman.socket dynflow\*
 {% endhighlight %}
@@ -75,45 +74,6 @@ Now it's time to perform the actual upgrade.
   <i>No operating system selected.</i>
 </div>
 
-<div class="upgrade_os upgrade_os_el8">
-To upgrade an existing Foreman installation, first update with the
-appropriate foreman-release package:
-
-{% highlight bash %}
-dnf upgrade https://yum.theforeman.org/releases/{{page.version}}/el8/x86_64/foreman-release.rpm
-{% endhighlight %}
-
-Clean up the yum metadata cache:
-
-{% highlight bash %}
-dnf clean metadata
-{% endhighlight %}
-
-If the Ruby 2.5 module was previously enabled, it must be reset:
-
-{% highlight bash %}
-dnf -y module reset ruby
-{% endhighlight %}
-
-Switch to the PostgreSQL 13 module:
-
-{% highlight bash %}
-dnf -y module switch-to postgresql:13
-{% endhighlight %}
-
-Enable the Foreman module:
-
-{% highlight bash %}
-dnf -y module enable foreman:el8
-{% endhighlight %}
-
-Next upgrade all Foreman packages:
-
-{% highlight bash %}
-dnf upgrade ruby\* foreman\*
-{% endhighlight %}
-</div>
-
 <div class="upgrade_os upgrade_os_el9">
 To upgrade an existing Foreman installation, first update with the
 appropriate foreman-release package:
@@ -215,7 +175,7 @@ Start the application server. This is redundant if you previously ran `foreman-i
 <div class="upgrade_os upgrade_os_none">
   <i>*No operating system selected.*</i>
 </div>
-<div class="upgrade_os upgrade_os_el8 upgrade_os_el9">
+<div class="upgrade_os upgrade_os_el9">
 {% highlight bash %}
 systemctl start httpd foreman.service foreman.socket
 {% endhighlight %}
diff --git a/_includes/manuals/nightly/1.2_release_notes.md b/_includes/manuals/nightly/1.2_release_notes.md
index 95fa10b5e4..c042901c21 100644
--- a/_includes/manuals/nightly/1.2_release_notes.md
+++ b/_includes/manuals/nightly/1.2_release_notes.md
@@ -4,21 +4,8 @@ This section will be updated prior to the next release.
 
 ### Headline features
 
-#### Running Foreman on Debian 12 (Bookworm)
-
-Foreman now supports running on Debian 12 (Bookworm).
-
 ### Upgrade warnings
 
-#### Running Foreman on Ubuntu 20.04 (Focal) is not supported anymore
-
-Foreman supports running on Ubuntu 22.04 LTS (Jammy Jellyfish) since 3.11.
-Running Foreman on Ubuntu 20.04 LTS has been deprecated since 3.12.
-Support for running Foreman on Ubuntu 20.04 LTS has been removed.
-
-Note this is for running Foreman itself.
-Clients will remain supported.
-
 ### Deprecations
 
 ### Release Notes
diff --git a/_includes/manuals/nightly/2.1_quickstart_installation.md b/_includes/manuals/nightly/2.1_quickstart_installation.md
index 1532a6f767..bcd1d58028 100644
--- a/_includes/manuals/nightly/2.1_quickstart_installation.md
+++ b/_includes/manuals/nightly/2.1_quickstart_installation.md
@@ -24,7 +24,6 @@ function update_quickstart_os(select) {
 To provide specific installation instructions, please select your operating system:
 <select onChange="update_quickstart_os(this);">
   <option value="none">-- select operating system --</option>
-  <option value="el8">Enterprise Linux 8</option>
   <option value="el9">Enterprise Linux 9</option>
   <option value="debian11">Debian 11 (Bullseye)</option>
   <option value="debian12">Debian 12 (Bookworm)</option>
@@ -37,16 +36,6 @@ To provide specific installation instructions, please select your operating syst
   <i>No operating system selected.</i>
 </div>
 
-<div class="quickstart_os quickstart_os_el8">
-  <p>
-    Enable Puppet's 8.x repository:
-  </p>
-
-{% highlight bash %}
-sudo dnf -y install https://yum.puppet.com/puppet8-release-el-8.noarch.rpm
-{% endhighlight %}
-</div>
-
 <div class="quickstart_os quickstart_os_el9">
   <p>
     Enable Puppet's 8.x repository:
@@ -57,14 +46,6 @@ sudo dnf -y install https://yum.puppet.com/puppet8-release-el-9.noarch.rpm
 {% endhighlight %}
 </div>
 
-<div class="quickstart_os quickstart_os_el8">
-  <p>Enable the Foreman repositories:</p>
-
-{% highlight bash %}
-sudo dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el8/x86_64/foreman-release.rpm
-{% endhighlight %}
-</div>
-
 <div class="quickstart_os quickstart_os_el9">
   <p>Enable the Foreman repositories:</p>
 
@@ -73,14 +54,6 @@ sudo dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el9/x86
 {% endhighlight %}
 </div>
 
-<div class="quickstart_os quickstart_os_el8">
-  <p>Enable the Foreman module:</p>
-
-{% highlight bash %}
-sudo dnf -y module enable foreman:el8
-{% endhighlight %}
-</div>
-
 <div class="quickstart_os quickstart_os_debian11">
   <p>
     Enable Puppet's 8.x repository:
@@ -147,7 +120,7 @@ echo "deb http://deb.theforeman.org/ plugins {{page.version}}" | sudo tee -a /et
   <i>No operating system selected.</i>
 </div>
 
-<div class="quickstart_os quickstart_os_el8 quickstart_os_el9">
+<div class="quickstart_os quickstart_os_el9">
 {% highlight bash %}
 sudo dnf -y install foreman-installer
 {% endhighlight %}
@@ -167,7 +140,7 @@ sudo apt-get update && sudo apt-get -y install foreman-installer
 
 The installation run is non-interactive, but the configuration can be customized by supplying any of the options listed in `foreman-installer --help`, or by running `foreman-installer -i` for interactive mode.  More examples are given in the [Installation Options](/manuals/{{page.version}}/index.html#3.2.2InstallerOptions) section.  Adding `-v` will disable the progress bar and display all changes.  To run the installer, execute:
 
-<div class="quickstart_os quickstart_os_none quickstart_os_debian11 quickstart_os_debian12 quickstart_os_ubuntu2204 quickstart_os_el8 quickstart_os_el9">
+<div class="quickstart_os quickstart_os_none quickstart_os_debian11 quickstart_os_debian12 quickstart_os_ubuntu2204 quickstart_os_el9">
 {% highlight bash %}
 sudo foreman-installer
 {% endhighlight %}
diff --git a/_includes/manuals/nightly/2_quickstart_guide.md b/_includes/manuals/nightly/2_quickstart_guide.md
index e0e4c16970..0a46de29b0 100644
--- a/_includes/manuals/nightly/2_quickstart_guide.md
+++ b/_includes/manuals/nightly/2_quickstart_guide.md
@@ -7,7 +7,6 @@ The installation will require 4GB of memory, see [System Requirements](manuals/{
 
 #### Supported platforms
 
-* Enterprise Linux 8, x86_64
 * Enterprise Linux 9, x86_64
 * Debian 11 (Bullseye), amd64
 * Debian 12 (Bookworm), amd64
diff --git a/_includes/manuals/nightly/3.1.1_supported_platforms.md b/_includes/manuals/nightly/3.1.1_supported_platforms.md
index 691ec44186..323cd08ac8 100644
--- a/_includes/manuals/nightly/3.1.1_supported_platforms.md
+++ b/_includes/manuals/nightly/3.1.1_supported_platforms.md
@@ -1,8 +1,5 @@
 The following operating systems are supported by the installer, have packages and are tested for deploying Foreman:
 
-* Red Hat Enterprise Linux 8
-  * Architectures: x86_64 only
-  * Apply all SELinux-related errata.
 * Red Hat Enterprise Linux 9
   * Architectures: x86_64 only
   * Apply all SELinux-related errata.
diff --git a/_includes/manuals/nightly/3.3.1_rpm_packages.md b/_includes/manuals/nightly/3.3.1_rpm_packages.md
index 9a2165ae7b..192a1b2801 100644
--- a/_includes/manuals/nightly/3.3.1_rpm_packages.md
+++ b/_includes/manuals/nightly/3.3.1_rpm_packages.md
@@ -1,7 +1,6 @@
 
 Foreman is packaged for the following RPM based distributions:
 
-* RHEL and derivatives, version 8
 * RHEL and derivatives, version 9
 
 **Note:** The RPM packages are not tested on Rocky Linux or Oracle Linux. The Foreman installation on Rocky Linux or Oracle Linux may or may not work.
@@ -26,11 +25,6 @@ Under each repo are directories for each distribution, then each architecture.
 
 To set up the repository, foreman-release packages are provided which add a repo definition to `/etc/yum.repos.d`. Install the release RPM and enable the module:
 
-    # EL8
-    dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el8/x86_64/foreman-release.rpm
-    dnf -y module enable foreman:el8
-    
-    # EL9
     dnf -y install https://yum.theforeman.org/releases/{{page.version}}/el9/x86_64/foreman-release.rpm
 
 ### Signing
diff --git a/_includes/manuals/nightly/3.6_upgrade.md b/_includes/manuals/nightly/3.6_upgrade.md
index a7128ad4df..748f84d29a 100644
--- a/_includes/manuals/nightly/3.6_upgrade.md
+++ b/_includes/manuals/nightly/3.6_upgrade.md
@@ -35,7 +35,6 @@ $(document).ready(function() {
 To provide specific installation instructions, please select your operating system:
 <select id="upgrade_os" onChange="update_upgrade_os(this);">
   <option value="none">-- select operating system --</option>
-  <option value="el8">Red Hat Enterprise Linux 8</option>
   <option value="el9">CentOS Stream 9 / Red Hat Enterprise Linux 9</option>
   <option value="debian11">Debian 11 (Bullseye)</option>
   <option value="debian12">Debian 12 (Bookworm)</option>
@@ -58,7 +57,7 @@ Before proceeding, it is necessary to shutdown the Foreman instance.
 <div class="upgrade_os upgrade_os_none">
   <i>No operating system selected.</i>
 </div>
-<div class="upgrade_os upgrade_os_el8 upgrade_os_el9">
+<div class="upgrade_os upgrade_os_el9">
 {% highlight bash %}
 systemctl stop httpd foreman.service foreman.socket dynflow\*
 {% endhighlight %}
@@ -75,45 +74,6 @@ Now it's time to perform the actual upgrade.
   <i>No operating system selected.</i>
 </div>
 
-<div class="upgrade_os upgrade_os_el8">
-To upgrade an existing Foreman installation, first update with the
-appropriate foreman-release package:
-
-{% highlight bash %}
-dnf upgrade https://yum.theforeman.org/releases/{{page.version}}/el8/x86_64/foreman-release.rpm
-{% endhighlight %}
-
-Clean up the yum metadata cache:
-
-{% highlight bash %}
-dnf clean metadata
-{% endhighlight %}
-
-If the Ruby 2.5 module was previously enabled, it must be reset:
-
-{% highlight bash %}
-dnf -y module reset ruby
-{% endhighlight %}
-
-Switch to the PostgreSQL 13 module:
-
-{% highlight bash %}
-dnf -y module switch-to postgresql:13
-{% endhighlight %}
-
-Enable the Foreman module:
-
-{% highlight bash %}
-dnf -y module enable foreman:el8
-{% endhighlight %}
-
-Next upgrade all Foreman packages:
-
-{% highlight bash %}
-dnf upgrade ruby\* foreman\*
-{% endhighlight %}
-</div>
-
 <div class="upgrade_os upgrade_os_el9">
 To upgrade an existing Foreman installation, first update with the
 appropriate foreman-release package:
@@ -215,7 +175,7 @@ Start the application server. This is redundant if you previously ran `foreman-i
 <div class="upgrade_os upgrade_os_none">
   <i>*No operating system selected.*</i>
 </div>
-<div class="upgrade_os upgrade_os_el8 upgrade_os_el9">
+<div class="upgrade_os upgrade_os_el9">
 {% highlight bash %}
 systemctl start httpd foreman.service foreman.socket
 {% endhighlight %}