Through the course of the campaign, Muhammad Ali watched the European powers carefully. Fearing another intervention that would reverse all his gains, he proceeded slowly and cautiously. For example, he continued the practice of using the Sultan’s name at Friday prayers in the newly captured territories. He continued to circulate Ottoman coins instead of issuing new ones bearing his likeness. So long as Muhammad Ali’s march did not threaten the complete collapse of the Ottoman state, the powers in Europe remained passive observers.