The Battle of Gemas—part of the wider Battle of Muar—took place during the Japanese invasion of Malaya in the Pacific Campaign of the Second World War. The action occurred on 14 January 1942 at the Gemencheh Bridge near Gemas and saw around 1,000 troops of the Japanese Japanese 5th Division killed or wounded during a fierce ambush initiated by Australian soldiers from 2/30th Battalion, assigned to the 27th Brigade of the 8th Division.