diff --git a/deploy-guide/source/app-aboutosa.rst b/deploy-guide/source/app-aboutosa.rst
index 3867cf5f82..aa0986f059 100644
--- a/deploy-guide/source/app-aboutosa.rst
+++ b/deploy-guide/source/app-aboutosa.rst
@@ -21,8 +21,8 @@ listed in our :dev_docs:`architecture reference <reference/architecture/index.ht
 Why choose OpenStack-Ansible?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-* Supports the major Linux distributions Ubuntu, CentOS (WIP) and OpenSUSE
-  (WIP).
+* Supports the major Linux distributions Ubuntu, CentOS, Debian
+  and OpenSUSE (experimental).
 * Supports the major CPU architectures x86, ppc64, s390x (WIP).
 * Offers automation for upgrades between major OpenStack releases.
 * Uses OpenStack defaults for each of the project roles, and provides
diff --git a/deploy-guide/source/deploymenthost.rst b/deploy-guide/source/deploymenthost.rst
index 7264f5522c..1b39896613 100644
--- a/deploy-guide/source/deploymenthost.rst
+++ b/deploy-guide/source/deploymenthost.rst
@@ -27,8 +27,11 @@ Install one of the following supported operating systems on the deployment
 hosts:
 
 * `Ubuntu server 18.04 (Bionic Beaver) LTS 64-bit <http://releases.ubuntu.com/18.04/>`_
-* `Centos 7 64-bit <https://www.centos.org/download/>`_
-* `openSUSE 42.X 64-bit <https://software.opensuse.org/distributions/leap>`_
+* `Ubuntu server 20.04 (Focal Fossa) LTS 64-bit <http://releases.ubuntu.com/20.04/>`_
+* `Debian 10 (Buster) LTS 64-bit <https://www.debian.org/distrib/>`_
+* `Centos 7 64-bit <http://isoredirect.centos.org/centos/7/isos/x86_64/>`_
+* `Centos 8 64-bit <http://isoredirect.centos.org/centos/8/isos/x86_64/>`_
+* `openSUSE 15.X (experimental) 64-bit <https://software.opensuse.org/distributions/leap>`_
 
 Configure at least one network interface to access the Internet or suitable
 local repositories.
diff --git a/deploy-guide/source/overview-requirements.rst b/deploy-guide/source/overview-requirements.rst
index 2c4bb6629b..78666d84f4 100644
--- a/deploy-guide/source/overview-requirements.rst
+++ b/deploy-guide/source/overview-requirements.rst
@@ -14,12 +14,21 @@ following minimum requirements:
 
   * Ubuntu 18.04 LTS (Bionic Beaver)
 
+  * Ubuntu 20.04 LTS (Focal Fossa)
+
   * Linux kernel version ``4.15.0-0-generic`` or later is required.
 
 * CentOS
 
+  .. note::
+
+    CentOS 7 supports only source installs, installation of OpenStack
+    with distro packages is not supported.
+
   * Centos 7, fully updated.
 
+  * Centos 8
+
   * Linux kernel version ``3.10.0`` or later.
 
 * openSUSE (support is experimental)
diff --git a/deploy-guide/source/targethosts-prepare.rst b/deploy-guide/source/targethosts-prepare.rst
index b5b964ebf4..c141666251 100644
--- a/deploy-guide/source/targethosts-prepare.rst
+++ b/deploy-guide/source/targethosts-prepare.rst
@@ -12,8 +12,10 @@ Install one of the following supported operating systems on the
 target host:
 
 * Ubuntu server 18.04 (Bionic Beaver) LTS 64-bit
+* Ubuntu server 20.04 (Focal Fossa) LTS 64-bit
 * Debian 10 64-bit
 * Centos 7 64-bit
+* Centos 8 64-bit
 * openSUSE 15.X 64-bit
 
 Configure at least one network interface to access the Internet or
diff --git a/doc/source/index.rst b/doc/source/index.rst
index b259d1c523..6771a1d523 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -9,10 +9,11 @@ configuration of an OpenStack environment.
 
 Documentation for each of the following releases is available.
 
-Ussuri: Under development
+Ussuri: Maintained
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
-OpenStack-Ansible Ussuri is currently in development.
+OpenStack-Ansible Ussuri series was first released with the 21.0.0 tag on
+14 August 2020.
 
 .. toctree::
    :maxdepth: 1
diff --git a/doc/source/user/aio/quickstart.rst b/doc/source/user/aio/quickstart.rst
index 4350ad59a9..2c89408f2c 100644
--- a/doc/source/user/aio/quickstart.rst
+++ b/doc/source/user/aio/quickstart.rst
@@ -128,9 +128,10 @@ version.
 
 .. note::
    The |current_release_formal_name| release is only compatible with
-   Debian 9 (stretch), Debian 10 (buster), Ubuntu 18.04 (Bionic Beaver),
-   CentOS 7 and CentOS 8. Experimentat support is provided for openSUSE
-   Leap 15.X but this is expected to be removed in the next major release.
+   Debian 10 (buster), Ubuntu 18.04 (Bionic Beaver), Ubuntu 20.04
+   (Focal Fossa), CentOS 7 and CentOS 8. Experimentat support is
+   provided for openSUSE Leap 15.X but this is expected to be removed
+   in the next major release.
 
 The next step is to bootstrap Ansible and the Ansible roles for the
 development environment.