the Ottoman government or Sublime Porte had to borrow money from European banks to finance its operations. When it was unable to repay the money it owed to the London and Paris-based banks, they took control of the Ottoman revenue system, seriously infringing on the Porte's sovereignty. Foreign interests also invested heavily in railroad, port, and infrastructure projects, giving them ever more power within the tottering empire. The Ottoman Empire remained self-governing until it fell after World War I, but foreign banks and investors wielded an inordinate amount of power there.