Japanese war history spans several significant conflicts, including the Sino-Japanese War and World War II. The Sino-Japanese War (1894-1895) marked Japan's emergence as a major power, leading to territorial gains in Taiwan and Korea. Japan's militarism intensified in the early 20th century, culminating in its involvement in World War II (1939-1945), where it sought to expand its empire across Asia and the Pacific. During World War II, Japan attacked Pearl Harbor in 1941, prompting the United States to enter the war. The conflict ended in 1945 after the atomic bombings of Hiroshima and Nagasaki, leading to Japan's surrender. Post-war, Japan underwent significant reforms and emerged as a peaceful nation, focusing on economic growth and international cooperation.