1. Use the timeline below to help you answer the question: What events caused the United States to enter World War I? Choose 2!

A.Assassination of Archduke Franz Ferdinand
B.The sinking of Lusitania
C.The Zimmerman Telegram
D. The new Russian leader Lenin

2. Use the graph below to answer the question: Why were US casualties so much lower than other countries?
A.The U.S. had better fighters.
B.The U.S. joined the war later.
C.The U.S. switched sides partway through the war
D.The U.S. didn't require a draft right away

1. The events that caused the United States to enter World War I were B. The sinking of Lusitania and C. The Zimmerman Telegram.

2. The reason why US casualties were so much lower than other countries was B. The US joined the war later.