human
I've heard that the United States is the only country that hasn't been invaded. Is that true?
assistant
No, it’s not true. The US has had its share of invasions and occupations. In 1898, the US sent troops to Cuba during the Spanish-American War. In 1917, the US entered World War I on the side of Britain and France. And in 1941, Japan attacked Pearl Harbor, leading to the US entering World War II.