Deliberate massacres of captives or civilians during wartime or periods of civil unrest by the state 's military forces , include those committed by Genghis Khan , the Golden Horde , the troops of Vlad the Impaler , the British Empire in its colonies , the Empire of Japan , the Soviet Union , and Nazi Germany during the Second Sino-Japanese War and World War II , the Nanjing Massacre , the Katyn Forest Massacre of Polish citizens in 1940 and the massacres of political prisoners after the launch of Operation Barbarossa , the Three Alls Policy , the massacre of Soviet Jews at Babi Yar , the mass murder of the Hungarian , Serbian and German population in Vojvodina in the " Vengeance of Bacska " , the murder of 24 unarmed villagers by British troops in the Batang Kali massacre during the Malayan Emergency , the mass killings in Indonesia during Suharto 's rise to power , the murder of suspected leftists during Operation '' Condor '' in South America , the murder of Vietnamese civilians by American soldiers in the My Lai Massacre during the Vietnam War , the genocidal massacres of the Maya population during the Guatemalan Civil War , the massacre at El Mozote during the Salvadoran Civil War , , and repeated attacks on civilians during the Syrian Civil War including the Al-Qubeir massacre
genocidal massacres of the Maya population
Guatemalan genocide
Homicide