Anybody knows what happened to the dwarves in LOTR. Never read The Hobbit. Did their entire civilization get wiped out by Sauron.
What do you mean? The orcs raided and killed every living dwarf in Moria, which was a major dwarven city, but there were other big dvarwen cities in the Third Age that was untouched by the war of the ring, such as the Iron Hills and the Blue Mountains.