Ishiyama Hongan-ji War

The Ishiyama Hongan-ji War (石山合戦, Ishiyama Kassen?), taking place from 1570 to 1580 in Sengoku period Japan, was an eleven-year campaign by warlord Oda Nobunaga against a network of fortifications, temples, and communities belonging to the Ikkō-ikki, a powerful faction of religious zealots. It centered on attempts to take down the Ikki's central base, the cathedral fortress of Ishiyama Hongan-ji, in what is today the city of Osaka. While Nobunaga and his allies led attacks on Ikki communities and fortifications in the nearby provinces, weakening the Hongan-ji's support structure, elements of his army remained camped outside the Hongan-ji, blocking supplies to the fortress and serving as scouts.