However, in spite of surprise attack force, they marched so slowly that their mission was noticed by Ieyasu's information networks; they got a surprise attack adversely on April 9 while they were pursued by TOKUGAWA troops, and Tsuneoki IKEDA, Motosuke IKEDA (Tsuneoki's son), Nagayoshi MORI and others were killed in the battle (the battle of NAGAKUTE),
しかし、奇襲部隊であるにも関わらず、行軍は鈍足だったために家康の張った情報網に引っかかり、4月9日には徳川軍の追尾を受けて逆に奇襲され、池田恒興・池田元助親子と森長可らは戦死してしまった（長久手の戦い）。