sentences:  In March 1812 Napoleon ordered the four regiments to recruit a third battalion, raising them to three battalions apiece, plus a small regimental battery of two 3-pdr guns to be attached to each regiment as per the standard French practice of the time.The whole would serve together as a single division attached to the Young Guard commanded by General of Division Claparede.The new third battalions of the regiments did not join their parent units until the retreat from Moscow was well underway.