Complex sentence: The Tenth Army was reinforced by the rested XXI Corps (General Paul Maistre) and the II Colonial Corps (General E. Blondlat) to attack on 10 October on a front in the centre of the army area towards Pressoir, Ablaincourt and Fresnes.
Split into simpler sentences: The Tenth Army attacked from and after being reinforced by the rested XXI Corps (General Paul Maistre) and the II Colonial Corps (General E. Blondlat). On 10 October the army attacked on a front in the centre of the army area towards Pressoir, Ablaincourt and Fresnes.