sex slaves. Definitions The Tokyo Charter defines war crimes as "violations of the laws or customs of war," which includes crimes against enemy combatants and enemy non-combatants. War crimes also included deliberate attacks on citizens and property of neutral states as they fall under the category of non-combatants, as in the case of the attack on Pearl Harbor. Military personnel from the Empire of Japan have been convicted of committing many such acts during the period of Japanese imperialism from the late 19th to mid-20th centuries. Japanese military soldiers conducted a series of human rights abuses against civilians and prisoners of war throughout East Asia and the western Pacific region. These events reached their height during the Second Sino-Japanese War of 1937–45 and the Asian and Pacific campaigns of World War II (1941–45). International and Japanese law Japan signed the 1929 Geneva Convention on the Prisoners of War and the 1929 Geneva Convention on the Sick and Wounded, but the Japanese government declined to ratify the POW Convention. In 1942, the Japanese government stated that it would abide by the terms of the Convention mutatis mutandis ('changing what has to be changed'). The crimes committed also fall under other aspects of international and Japanese law. For example, many of the crimes committed by Japanese personnel during World War II broke Japanese military law, and were subject to court martial, as required by that law. The Empire also violated international agreements signed by Japan, including provisions of the Hague Conventions (1899 and 1907) such as protections for prisoners of war and a ban on the use of chemical weapons, the 1930 Forced Labour Convention which prohibited forced labor, the 1921 International Convention for the Suppression of the Traffic in Women and Children which prohibited human trafficking, and other agreements. The Japanese government also signed the Kellogg-Briand Pact (1929), thereby rendering its actions in 1937–45 liable to charges of crimes against peace, a charge that was introduced at the Tokyo Trials to prosecute "Class A" war criminals. "Class B" war criminals were those found guilty of war crimes per se, and "Class C" war criminals were those guilty of crimes against humanity. The Japanese government also accepted the terms set by the Potsdam Declaration (1945) after the end of the war, including the provision in Article 10 of punishment for "all war criminals, including those who have visited cruelties upon our prisoners".