One of the two routes considered was 'Hirosaki-the bank of Lake Towada-Sanbongi-Tashiro-Aomori' and the other was 'Aomori-Tashiro-Sanbongi-Hachinohe;' the 31st Hirosaki Regiment took on the former and the 5th Aomori Regiment the latter.
そのルートは「弘前～十和田湖畔～三本木～田代～青森」と「青森～田代～三本木～八戸」の2ルートが考えられ、弘前ルートは弘前第31連隊が、八戸ルートは青森5連隊がそれぞれ受持つ形となった。