The country between the Loir and the Sarthe through which the Germans had to march, presents peculiar difficulties to an invading force, and affords marked advantages to the defence.
All the roads leading to Le Mans intersect at right angles, stream after stream flowing through broad and deeply cut meadow-valleys. Groves, villages, and châteaux with walled parks cover the highly cultivated upland; vineyards, orchards and gardens are enclosed by hedges, ditches or fences.
Hence almost the whole burthen of the impending fighting would have to be borne by the infantry; nowhere was there space for the deployment of cavalry, and the use of artillery needs must be extremely limited, since in a country so greatly enclosed guns could only singly be brought into action. The enemy's central position could be approached by only four main roads, and the communications between the marching columns, starting at the least some thirty miles apart, would be confined to the cross roads, almost impassable from the severity of the season and the hostility of the inhabitants. Any lateral mutual support was at first quite out of the question.
Under such conditions the movements could only be guided by general instructions, and even the leaders of lower grades had to be left free to act at their own individual discretion. Specific orders for each day, though they would of course be issued, could not in many cases be possibly carried out. In the Army Headquarter it could not be foreseen in what situation each individual corps might find itself after a day's fighting. Reports could only come in very late at night, and the orders drawn up however early would often arrive only after the troops, because of the shortness of the day, had already set out on the march.
_January 7th._--In obedience to orders from the Army Headquarter, General Voigts-Rhetz on the 7th sent the part of the 19th Division which had already reached Vendôme, back to St. Amand in reinforcement. The 38th Brigade had again entered that place early in the day, and General von Hartmann, taking over its command, advanced along the Château Renault high road, the cavalry moving on both flanks.
The column first struck the enemy near Villechauve at mid-day. A thick fog prevented the employment of the artillery, and it was at the cost of heavy loss that Villechauve, Pias, and various other farmsteads were captured. Villeporcher and the adjacent villages remained in possession of the French, who at about two o'clock advanced by the high road to the attack with several battalions. The weather had cleared, and it was soon evident that this offensive was only intended to mask the beginning of the enemy's retreat to the westward. The troops took quarters where they stood, and the reinforcements forwarded to them remained at St. Amand.