The war came at a great cost in lives and economic damage - a half a million Iraqi and Iranian soldiers as well as civilians are believed to have died in the war with many more injured and wounded - but brought neither reparations nor change in borders. The conflict is often compared to World War I, in that the tactics used closely mirrored those of the 1914–1918 war, including large scale trench warfare, manned machine-gun posts, bayonet charges, use of barbed wire across trenches and on no-mans land, human wave attacks by Iran, and Iraq's extensive use of chemical weapons (such as mustard gas) against Iranian troops and civilians as well as Iraqi Kurds.