Why didn't the Treaty of Sevres last?

The Treaty of Sèvres, signed in 1920, failed to last primarily due to widespread opposition from the Turkish nationalist movement led by Mustafa Kemal Atatürk, who rejected the treaty's terms that imposed severe territorial losses on Turkey. Additionally, the treaty was never fully ratified, and the subsequent Greco-Turkish War further undermined its legitimacy. The eventual signing of the Treaty of Lausanne in 1923, which recognized a new, sovereign Turkish state, replaced the Sèvres treaty and established a more favorable outcome for Turkey.