the recapture of the city of Constantinople in 1261 CE by the forces led by Alexios Strategopoulos of the Empire of Nicaea from Latin occupation, leading to the re-establishment of the Byzantine Empire under the Palaiologos dynasty, after an interval of 57 years where the city had been made the capital of the occupying Latin Empire that had been installed by the Fourth Crusade in 1204 following the Crusader Sack of Constantinople.

the event when the Qing dynasty reconquered Xinjiang after the Dungan Revolt in the late 19th century.