Honnō-ji is most famous for the Honnō-ji Incident. Oda Nobunaga lodged there before his invasion of the west. However on the morning of June 21, 1582, the traitorous forces of Akechi Mitsuhide surrounded the temple and set it on fire. Knowing there was no way out for him, Nobunaga committed seppuku along with his attendant Mori Ranmaru. Ranmaru's brothers also perished at Honnō-ji.
Now... is Ragyo parallel to Nobunaga, or is it someone else?
also in some other series I've heard phrase 'sen-i-soshitsu' - it probably used different kanji... but it was translated as a 'lost will to fight'.