Battle of Yamazaki
In 1582, as Oda Nobutaka's second in command, Nagahide launched a campaign on Shikoku; but before he made any progress, Nobunaga died during an attack by Akechi Mitsuhide. Nagahide abandoned the campaign and turned back to help Hashiba Hideyoshi avenge this by killing Mitsuhide at Battle of Yamazaki.