The Japanese invasions of Korea of 1592–1598 involved two separate yet linked invasions: an initial invasion in 1592 (Korean: 임진왜란), a brief truce in 1596, and a second invasion in 1597 (Korean: 정유재란). The conflict ended in 1598 with the withdrawal of Japanese forces from the Korean Peninsula after a military stalemate in Korea's southern provinces. The invasions were launched by Toyotomi Hideyoshi with the intent of conquering the Korean Peninsula and China proper, which were ruled by the Joseon and Ming dynasties, respectively. Japan quickly succeeded in occupying large portions of the Korean Peninsula, but the contribution of reinforcements by the Ming, as well as the disruption of Japanese supply fleets along the western and southern coasts by the Joseon navy forced the Japanese forces to withdraw from Pyongyang and the northern provinces. Afterwards, with righteous armies (Joseon civilian militias) conducting guerrilla warfare against the occupying Japanese forces and supply difficulties hampering both sides, neither force was able to mount a successful offensive or gain any additional territory, resulting in a military stalemate. The first phase of the invasion ended in 1596, and was followed afterwards by ultimately unsuccessful peace negotiations between Japan and the Ming. In 1597, Japan renewed its offensive by invading Korea a second time. The pattern of the second invasion largely mirrored that of the first. The Japanese had initial successes on land, capturing several cities and fortresses, only to be halted and forced to withdraw to the southern coastal regions of the peninsula. However, the pursuing Ming and Joseon forces were unable to dislodge the Japanese from these positions, where both sides again became locked in a ten-month long military stalemate. With Toyotomi Hideyoshi's death in 1598, limited progress on land, and continued disruption of supply lines by the Joseon navy, the Japanese forces in Korea were ordered to withdraw back to Japan by the new governing Council of Five Elders. Final peace negotiations between the parties followed afterwards and continued for several years, ultimately resulting in the normalization of relations. The Japanese invasions of Korea at the time were the largest seaborne invasions in history, with the Japanese committing over 300,000 men to the campaigns. The size and scale of the invasions wouldn't be matched or surpassed for nearly 350 years until the Normandy landings of June 6, 1944, when nearly 352,000 Allied troops were committed to the invasion.

Japanese invasions of Korea (1592–1598) - Wikipedia