Young Turks were a heterodox group of secular liberal intellectuals and revolutionaries, united by their opposition to the absolutist regime of Abdulhamid and desire to reinstate the constitution. After the revolution, the Young Turks began to splinter and two main factions formed: more liberal and pro-decentralization Young Turks (including the CUP's original founders) formed the , the Ottoman Liberty Party and later the Freedom and Accord Party (also known as the Liberal Union or Liberal Entente). The Turkish nationalist, pro-centralization and radical wing among the Young Turks remained in the Committee of Union and Progress. The groups' power struggle continued until 1913, when the Grand Vizier Mahmut Şevket Pasha was assassinated, allowing the CUP to take over all institutions. The new CUP leadership (Three Pashas) established a one party state and exercised absolute control over the Ottoman Empire, overseeing the empire's entry into World War I on the side of the Central Powers during the war. The CUP regime also planned and executed the Late Ottoman genocides as part of their Turkification policies.