Which nation's aggression in Asia contributed to the onset of World War II?

Japan's aggression in Asia is a key factor that contributed to the onset of World War II. In the 1930s, Japan sought to expand its empire by invading and occupying several territories in Asia, most notably Manchuria in 1931 and later China in 1937. This military expansion was driven by Japan's desire for natural resources and a larger sphere of influence in the region, leading to conflicts with other nations.

The invasion of China marked the beginning of significant hostilities in Asia, leading to widespread atrocities such as the Nanking Massacre, which drew international condemnation. Additionally, Japan's aggressive actions were viewed as a threat to Western powers, particularly the United States and Britain, which had interests in the Pacific. The culmination of Japan's militaristic expansionism contributed directly to the tensions that sparked World War II, as these aggressive policies clashed with the interests of other nations, leading to a series of alliances and conflicts that ultimately resulted in a global war.

Countries like China and India did face significant challenges during this era, but their roles were quite different. China was primarily a victim of Japanese aggression, and India, under British colonial rule, was more focused on its struggle for independence during this period. North Korea did