Battle of Komaki and Nagakute
The Negoro-gumi, the warrior monks of Negoro-ji, were quite skilled in the use of firearms, and were devout followers of Shingi, a branch of the Shingon sect of Buddhism. They were allied with the Ikkō-ikki, and with Tokugawa Ieyasu, one of Toyotomi's chief rivals. In particular, they attracted Hideyoshi's ire for their support of Tokugawa in the Battle of Komaki and Nagakute the previous year.