What was a war crime committed by japan? apex?

A war crime committed by Japan was the Nanking Massacre of 1937.

Explanation:

The Nanking Massacre refers to the crimes committed by the Japanese Imperial Army in Nanking, China, following the fall of the capital of the Republic of China against the Japanese troops on December 13, 1937.

The Japanese Army moved north after capturing Shanghai in October 1937, and conquered Nanking at the Battle of Nanking on December 13, 1937. The commanders of the Chinese Nationalist Army had fled the city before the entry of the Japanese Army, leaving behind thousands of Chinese soldiers trapped in the walled city. Many of them took off their uniforms and escaped to the so-called Security Zone prepared by the foreign residents of Nanking. What happened after the entry of the Japanese Army into the city of Nanking is and has been the basis of the heated historical discussion and political tension, particularly between China and Japan in recent years.

The war crimes committed during this event include pillage, sexual abuse, and the killing of civilians and prisoners of war. The extent of the atrocities is debated between China and Japan, ranging from the Chinese government's assertion of a non-combatant death toll of more than 300,000, to the assertion of the Japanese army at the International Military Tribunal for the Far East after World War II, that the death toll was all military and that there were no organized massacres or atrocities committed against civilians.

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.