Turkish nationalists under Mustapha Kemal Pasha were unhappy about the loss of lands to Greece under the Sèvres Treaty. The Turks drove back the Greeks from Smyrna by force in August 1922 and threatened to cross the Dardanelles. British worried about security of safe zone, and they also feared for the security of the Straits. Lloyd George, the prime minister of the period,tried to reinforce British positions in Chanak in order to prevent the Turks’ attacks. Conflict was averted by an agreement settled on 11 October. Eastern Thrace and Adrianople were returned to Turkey in return for recognition of the neutral zones of the Dardanelles.