Hideyoshi mobilised a force of 200,000 soldiers and 20,000 pack animals, transporting supplies for an even larger army of 300,000 men. Toyotomi Hidenaga led the vanguard of 25,000 men and 3,000 horses. By April 1587 Hideyoshi had reached the straits at Shimonoseki, moving through Chikuzen and Chikugo to attack Yoshihisa in Higo. At this point Mōri forces under Kobayakawa Takakage joined Hidenaga's force, as the Mōri had been recently suppressed. Hidenaga then drove back the Shimazu forces in Hyūga and Bungo. The Shimazu fought well, but had few firearms and lacked discipline and training; they were steadily overwhelmed through the superior quality and quantity. By the end of May 1587, the various island daimyos had turned to Hideyoshi's side. In June, Shimazu was routed in Satsuma itself, and Hideyoshi laid Siege of Kagoshima castle. Yoshihisa sued for peace, and a truce was agreed. Hideyoshi offered generous terms for a lasting peace to son of Yoshihiro's and Iehisa's; though Yoshihisa initially refused the offer, Hideyoshi tried again and was this time successful.
