The Tangier International Zone in 1923 under the joint administration of France, Spain and Britain under an international convention signed in Paris on 18 December 1923.
However, Spanish troops occupied Tangier on 14 June 1940, the same day Paris fell to the Germans. Despite calls by Spanish nationalists to annex “Tánger español”, the Franco regime publicly considered the occupation a temporary wartime measure. A diplomatic dispute between Britain and Spain over the latter’s abolition of the city’s international institutions in November 1940 led to a further guarantee of British rights and a Spanish promise not to fortify the area. The territory was restored to its pre-war status on October 11, 1945.
In July 1952 the protecting powers met at Rabat to discuss the Zone’s future, agreeing to abolish it. Tangier joined with the rest of Morocco following the restoration of full sovereignty in 1956.