Home > General Knowledge > Important Dates and EventsWhat year did the U.S. enter World War I?A. 1917 B. 1916 C. 1915 D. 1918Answer: 1917Additional Information: The United States entered World War I on April 6, 1917. Subjects: Important Dates and Events, General KnowledgeRelated MCQsWhen was the first digital signal processing chip developed?When did the first human heart transplant take place?What year did the first edition of the ‘Harry Potter’ series come out?When was the first effective treatment for HIV developed?What year did the first GPS satellite launch?What year was the first successful vaccine for smallpox created?When was the first video recorded?When was the first manned mission to the International Space Station launched?When was the first MRI machine introduced?What year was the first successful coronary artery bypass surgery performed?What year was the first commercial airline flight?What year did the first documentary film, ‘Nanook of the North,’ get released?What year did the first online video platform, YouTube, launch?When was the first televised presidential debate in the US?What year was the first successful test of the atomic bomb?