Trấn Bình đài

The Trấn Bình đài, also called Mang Cá Garrison (đồn Mang Cá) is a small fortress on the northeast corner of the Imperial City, Huế.

The fortress follows the French military engineer Vauban's typical layout, and has 21 canon emplacements.

History
During the Vietnam War the Mang Ca Garrison and the surrounding area served as the headquarters for the Army of the Republic of Vietnam (ARVN) 1st Division.

The base was abandoned by the ARVN on 23 March 1975 as part of the withdrawal to Danang in the face of the People's Army of Vietnam (PAVN) Hue–Da Nang Campaign.

Current use
The base remains in use by the PAVN.