The outbreak of the world war in 1939 temporarily arrested the ongoing decline, with the city's shipyards and heavy industries working at capacity to fuel the war effort, but this too came at a price — the Luftwaffe bombing of Clydeside (the worst of which was the Clydebank Blitz in March 1941 (although the target of the bombing, the shipbuilding town of Clydebank, is just outside Glasgow itself).