During the night of July 18, the great allied forces, comprising the Migashimikawa army under Tadatsugu SAKAI, the yoriki (assistants to commanders) including Nagachika KANAMORI of the Oda force, and approximately 3,000 (or 4,000 men according to "The Shinchoko-ki") with 500 teppo, crossed Toyo-gawa River in secret.
5月20日(旧暦)夜、酒井忠次率いる東三河衆の他、織田軍・金森長近などの与力、また鉄砲500丁を持たせた計約3000名という連合軍の大部隊（『信長公記』によると約4000名）が、密かに豊川を渡河。