The site deals mostly with Soviet armoured vehicles & doctrine of the WW2 period with some articles also devoted to German vehicles and a small section on US support vehicles
I was thinking specifically of Raellus because of these pages
http://russian-tanks.com/deep-battle1.php
http://russian-tanks.com/soviet-doctrine.php
but others here might find the site worth a read.
http://russian-tanks.com/ specifically the
Category Of Tanks page because even though it mainly focuses on Soviet vehicles of WW2, there is a section on post-war US vehicle developments (primarily devoted to APCs and other support vehicles).