diff --git a/docs/chapters/hardened-bsd.rst b/docs/chapters/hardened-bsd.rst
new file mode 100644
index 00000000..02479421
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+++ b/docs/chapters/hardened-bsd.rst
@@ -0,0 +1,95 @@
+HardenedBSD
+===========
+
+Bastille supports HardenedBSD as an OS since it is FreeBSD based. There
+are some differences in how HBSD handles release names, update, and
+upgrades.
+
+Most of the Bastille commands will work with HardenedBSD, but please report
+any bugs you may find.
+
+There are a number of ways in which HardenedBSD differs from FreeBSD.
+Most of the functionality is the same, but some things are different.
+See the following examples...
+
+Bootstrap
+---------
+
+HardenedBSD follows the ``STABLE`` branches of FreeBSD, and releases
+are named ``X-stable``, where ``X`` is the major version of a given FreeBSD
+branch/release.
+
+It also has a ``current`` release, which follows the master/current
+branch for the latest FreeBSD release.
+
+When bootstrapping a release, use the above release keywords.
+
+Updating
+--------
+
+To update HardenedBSD jails/releases you can do the following:
+
+Thick Jails
+^^^^^^^^^^^
+
+1. Use ``bastille update TARGET`` to update the jail
+2. Upgrade complete!
+
+Thin Jails
+^^^^^^^^^^
+
+See ``bastille update RELEASE`` to update thin jails, as thin
+jails are based on a given release.
+
+Releases
+^^^^^^^^
+
+1. Use ``bastille update 15-stable`` to update the release to the latest version
+2. Update complete!
+
+Upgrading
+---------
+
+To upgrade HardenedBSD jails to a different (higher) release (ie; 14-stable > 15-stable)
+you can do the following:
+
+Thick Jails
+^^^^^^^^^^^
+
+1. Use ``bastille upgrade TARGET current`` to upgrade the jail to
+   the ``current`` release
+2. Force the reinstallation or upgrade of all installed packages (ABI change):
+   ``pkg upgrade -f`` within each jail (or ``bastille pkg ALL upgrade -f``)
+3. Upgrade complete!
+
+Thin Jails
+^^^^^^^^^^
+
+1. Ensure the new release is bootstrapped: ``bastille bootstrap 15-stable``
+2. Update the release: ``bastille update 15-stable``
+3. Stop the jail(s) that need to be updated.
+4. Use ``bastille upgrade TARGET 15-stable`` to automatically change the
+   mount points to 15-stable
+5. Start the jail(s)
+6. Force the reinstallation or upgrade of all installed packages (ABI change):
+   ``pkg upgrade -f`` within each jail (or ``bastille pkg ALL upgrade -f``)
+7. Upgrade complete!
+
+Releases
+^^^^^^^^
+
+The ``upgrade`` sub-command does not support upgrading a release
+to a different release. See ``bastille bootstrap`` to bootstrap
+the new release.
+
+Limitations
+-----------
+
+Bastille tries its best to determine which *BSD you are using. It is possible to
+mix and match any of the supported BSD distributions, but it is up to the end
+user to ensure the correct environment/tools when doing so. See below...
+
+* Running HardenedBSD jails/releases requires many of the tools found only
+  in the HardenedBSD base.
+* Running FreeBSD jails/releases requires many of the tools found only in
+  the FreeBSD base.
diff --git a/docs/index.rst b/docs/index.rst
index 476120ce..c95b27a7 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -24,6 +24,7 @@ https://docs.bastillebsd.org.
    chapters/migration
    chapters/centralized-assets
    chapters/template
+   chapters/hardened-bsd
    chapters/linux-jails
    chapters/pkgbase
    chapters/zfs-support