It covered the front line that ran from the French border to the Sierra de Alcubierre,[1] with its headquarters in Barbastro.

[2][3] During the following months some of its forces intervened in the offensives of Huesca (June), Zaragoza (August) and Biescas (September-October), which, however, did not bear the desired results: both Huesca and Jaca remained in the hands of the nationalist forces.

1] At the beginning of April the X Army Corps, after a long retreat, they maintained their positions on the defensive line of the Segre River.

At the beginning of the Catalonia Campaign the X Army Corps continued to cover the Segre line.

Its troops offered resistance to the nationalist assault, although at the beginning of 1939 the formation was forced to withdraw towards the French border along with the rest of the Eastern Army.