The United Arab Republic (UAR; Arabic: , romanized: al-Jumhryah al-'Arabyah al-Muttaidah) was a sovereign state in the Middle East from 1958 until 1971. It was initially a political union between Egypt (including the occupied Gaza Strip) and Syria from 1958 until Syria seceded from the union after the 1961 Syrian coup d'tat. Egypt continued to be known officially as the United Arab Republic until 1971.

The republic was led by Egyptian President Gamal Abdel Nasser. The UAR was a member of the United Arab States, a loose confederation with the Mutawakkilite Kingdom of Yemen, which was dissolved in 1961.

A coup d'état ( (listen); French for "blow of state"), often shortened to coup in English (also known as an overthrow), is a seizure and removal of a government and its powers. Typically, it is an illegal seizure of power by a political faction, rebel group, military, or a dictator. Many scholars consider a coup successful when the usurpers seize and hold power for at least seven days.