WWI U.S. Army Belt With German Officer Uniform Button Trophies Attached

Description

United States? Waterbury Buckle Company. World War One yes, Found in a canvas bag of U.S., German and British World War One items.
Confusing hand made belt, ran out of room on the belt, How bad did it get?
Buttons are:
13 German Officer
3   U.S.  ( friendly Fire?)
1   Canada
1 cannon barrels Bulgarian Artillery Officer
1 #.9 German
1 copper German
2 silver German
1 Lion with crown Imperial German Bavarian Rampant Lion
1 Bomb I think is French