Peter II of Yugoslavia was born on September 6, 1923, and became the last king of Yugoslavia at a young age. He ascended to the throne in 1934 after the assassination of his father, King Alexander I. Due to political instability and the rise of fascism in Europe, he spent much of his reign in exile during World War II. After the war, Yugoslavia became a communist state, and Peter II was officially deposed in 1945. He lived in exile for the rest of his life, primarily in the United States, where he passed away on November 3, 1970.