Trench warfare dominated World War I as both sides dug networks of trenches for protection from artillery fire and attacks. Soldiers lived for long periods in wet, muddy trenches infested with rats that fed on human corpses. Despite heavy casualties from assaults, there was little gained territory. A remarkable Christmas Truce in 1914 saw British and German soldiers temporarily cease fire to celebrate Christmas together with singing, gifts, and a soccer match in no man's land between trenches.