With the order of Ieyasu in 1600, Ietada remained garrisoned at Fushimi-jo Castle, together with Mototada TORII, Ienaga NAITO and others, and they lured Mitsunari ISHIDA and the like to raise an army composed of forces from the western part of the country.
慶長5年（1600年）、家康の命で鳥居元忠、内藤家長らと共に伏見城の守備に残り、石田三成ら西軍の挙兵を誘った。