1942 from may to June, Japan attacked Solomon islands, east new guinea and midway island in order to cut off the ties between the United States and Australia. In the Battle of Coral Sea (May 7-8) and the Battle of Midway Island (June 4-5), Japan suffered heavy losses. On August 7 of the same year, the US military began a partial counterattack and landed on Guadalcanal Island in Solomon Islands to launch a long-term battle. Because the United States mastered the air and sea power, the Japanese army was hit hard. 1June, 943,165438+1October, the allied forces began a big counterattack, attacking the Japanese-occupied areas from the central and southwestern Pacific Ocean. 1944 During the spring and summer, the United States successively seized the Marshall Islands, Caroline Islands and Mariana Islands under Japanese mandate. On June+10, 5438, a naval battle broke out in Leyte Bay, and all Japanese naval and air forces were wiped out. 1945 1 American troops landed in Luzon Island and occupied Manila in March. From March to June of the same year, the US military gradually approached Japan. On August 8, the Soviet Union declared war on Japan, and on August 9, the Soviet Union launched a general attack on the Japanese Kwantung Army. At the same time, it entered the southern part of Sakhalin Island and the Kuril Islands. At the same time, anti-Japanese armed forces such as the Eighth Route Army and the New Fourth Army under the leadership of the China Producer Party launched a comprehensive counterattack against the Japanese army. 15h In August, Japan was forced to declare its surrender, and the countries of the anti-fascist alliance won the final victory in the Pacific War.