The Battle of Rain (also called the Battle of the River Lech or Battle of Lech) was fought on 15 April 1632 as part of the Thirty Years' War. The forces involved in this conflict were 40,000 Swedish troops under Gustavus Adolphus and 25,000 Catholic League troops under Johan Tserclaes, Count of Tilly. It was the second meeting between the two legendary generals (see First Breitenfeld when Tilly received the first setback of his long and storied career) and like at Breitenfeld, Tilly lost when Gustavus forded the river Lech under the cover of his superb artillery.