They reached Constantinople by 1 August. Byzantine Emperor Alexius I Comnenus, not knowing what else to do with such an unusual and unexpected "army", quickly ferried all 30,000 across the Bosporus by 6 August. Alexius warned Peter not to engage the Turks, whom he believed to be superior to Peter's motley army, and to wait for the main body of crusaders, which was still on the way.