Starting from 1830, Douera was initially a camp and a military hospital established in place of a Turkish surveillance post called Bordj El Hamar on a promontory overlooking the plain of Mitidja, particularly on the main road from Alger to Blida.

On November 30, 1843, a battle took place in Ouled Mendil between Arab troops and the 13th Infantry Regiment.

It became an important military center hosting two barracks (named Damrémont and Bugeaud) and regiments of the 19th Army Corps.

From 1923, Douera became home to a major military transmission center, and in 1962, an important hospital-hospice with 2,000 beds was established there.

In 1984, a new territory was detached from Douera to create the commune of Rahmania around the village formerly named Sainte Amélie.