Couple of IS-3 were send in Manchuria for tests, but they didn't arrived in time, so they didn't took action in WWII. However 52 tanks were represent at Berlin victory parade in September.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .