lost territory
Refers to land or territory that has been lost, typically in a political, military, or historical context. Often used in news reports.
The country held a lot of lost territory after the war.
失地回復を目指す外交政策が議論された。
A foreign policy aiming at the recovery of lost territory was discussed.
recovery of lost territory; regaining lost ground; fence-mending
Compound of 失 (loss) and 地 (land/territory). The reading しっち is a standard on'yomi combination.