As Germany defeated the countries of Europe, the Jews were rounded up, sent to death camps and exterminated. Death camps used gas chambers, firing squads, starvation, beatings and any method that they found convenient. After the Jews were killed, the Germans often used remaining Jews to load the bodies into the furnaces. Toward the end, they became so desperate to hide what they had done, they dug large trenches, lined up the Jews and shot them with machine gunes, pushing the bodies into the trenches. It still remains one of the worst attrocities of human history.