Bismarck made an alliance with Italy on 8 April, committing it to the war if Prussia entered one against Austria within three months, which was an obvious incentive for Bismarck to go to war with Austria within three months to divert Austrian strength away from Prussia. Austria responded with a mobilization of its Southern Army on the Italian border on 21 April. Italy called for a general mobilization on 26 April and Austria ordered its own general mobilization the next day. Prussia's general mobilization orders were signed in steps on 3, 5, 7, 8, 10 and 12 May.