Angustia was a fort in the Roman province of Dacia in the 2nd and 3rd centuries AD[5][4] today near the town of Breţcu, Romania.

It was the key centre for defence of the eastern half of Roman Dacia as it controlled the vulnerable Oituz Pass.

It was remote and at least 200km from the so-called Imperial Road, the backbone of the Roman communication system connecting Drobeta (on the Danube) to Porolissum.

The main routes for supplying this strategic fort from the eastern frontier eventually collapsed one by one and the remaining route along the Alutus was 472 km.

[6] Its garrison was Cohors I Bracaraugustanorum.