What happened to American fleets at Pearl Harbor on December 7, 1941? O A. It was ugraded to Carry Aircraft
O B. It was destroyed by a Japanese attack
O C. It fought in WWI
OD. It carried out an attack on the Japanese

B. They were destroyed by a Japanese attack

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.