The Ottoman Interregnum or Ottoman Civil War was a civil war in the Ottoman Empire between the sons of Sultan Bayezid I following their father's defeat and capture by Timur in the Battle of Ankara on 20 July 1402.

There were a variety of flags flown by ships of the Commonwealth during the Interregnum of 1649–1660.

The French and British interregnum in the Dutch East Indies of the Dutch East Indies took place between 1806 and 1816.

The interregnum in the British Isles began with the execution of Charles I in January 1649 (and from September 1651 in Scotland) and ended in May 1660 when his son Charles II was restored to the thrones of the three realms, although he had been already acclaimed king in Scotland since 1649.