But soon he decided to oppose the Committee of Union and Progress (CUP) and became a figurehead of the more liberal and pro-decentralization opposition group of Young Turks, known as the Freedom and Accord Party (also Liberal Union or Entente).
The individual in question shifted his allegiance from the Committee of Union and Progress (CUP) to become a prominent figure within the Young Turks movement, specifically leading the more liberal and pro-decentralization faction known as the Freedom and Accord Party (also referred to as the Liberal Union or Entente).