French Fourth Republic
Some attempts were made to strengthen the executive to prevent the unstable situation that had existed before the war, but the instability remained and the Fourth Republic saw frequent changes in government.
These problems came to a head in 1958 because of the Algerian War, which pitted Algerian colonists, the army, and the far right, against the left and those who wanted peace. To deal with this problem the nation turned to WWII hero Charles de Gaulle who assumed power under the precondition that a new constitution would be introduced creating a powerful presidency. These changes were introduced and the Fifth Republic was born.