Retrocession is the return of something (e.g., land) that was ceded in general or, specifically:
Examples:
District of Columbia retrocession, the retrocession to Virginia, and potentially to Maryland, of the land ceded to create the District of Columbia
Retrocession of Louisiana (New Spain) from Spain to France, formally accomplished just three weeks before the U.S. received the Louisiana Purchase lands from France
Taiwan retrocession, the retrocession of Taiwan from Japan to China in 1945; See Taiwan under Japanese rule
Retrocession Day, an annual observance and unofficial holiday in Taiwan
In insurance, retrocessional arrangements generally are governed by a reinsurance or retrocessional agreement and the principles applicable to reinsurance also are applicable to retrocessional cover.
