Wikipedia talk:WikiProject Military history/Assessment/Drive/80

I am not sure where to go to ask a question about WWI. I have been told that my granfather served in WWI U.S. Calvary and is it called the Army today? Where can I go to find this information out. There are so many branches of the service and departments to contact and I just don't know where to start. If anyone can help guide me I sincerely would appriciate it.

bwelsh@cox.net