The first blow struck in the war—for the parade at Saarbrück does not deserve the name of a blow—was delivered on the Lauter by the Crown Prince. The French Army in Alsace, commanded by Marshal MacMahon, had been collected at Strasburg from the garrisons in the Eastern region. At first it consisted of the 1st Corps, which included four infantry divisions, troops of the Line, to which were added, before the end of July, three regiments of Zouaves, and three of native Algerians, which were distributed among the French infantry brigades. There were three brigades of cavalry, ninety-six guns, and twenty-four mitrailleuses, the Emperor’s pet arm. The Divisional Commanders were Ducrot, Abel Douay, Raoult, and Lartigue; and the horsemen were under the orders of Duhesme. The 7th Corps, nominally at Belfort, under Félix Douay, actually distributed in several places, one division being at Lyons, another at Colmar, was also within the command of MacMahon; so that, on the 4th of August, he was at the head of two Corps, one of which was many miles distant from his head-quarters. He had, however, moved forward with Ducrot and Raoult to Reichshofen and Lartigue to Hagenau, while Abel Douay was pushed still further northward at Wissembourg, which he reached on the 3rd, but with a portion only of his troops. In fact, at that date, the army of MacMahon was strung out between the Lauter and Lyons, and even the portion which may be described as concentrated, consisted of fragments posted or on the march between Wissembourg and Hagenau. That very morning, the 1st Division of the 7th Corps started by railway from Colmar to join the Marshal. It was upon this scattered array that the Crown Prince was advancing. MacMahon, who had intended to assume the offensive himself on the 7th of August, did not know how near and how compact was the host of his foes. Abel Douay, established on the Lauter, was obliged to part with several battalions to keep up his communications, through Lembach, with the main body. He sent out a party on the evening of the 3rd, and early on the 4th, yet each returned bearing back the same report—they had seen and learned nothing of the enemy. Indeed, it would be difficult to find a single instance in which the researches of the French were thrust far enough to touch the Germans, all their reconnoitring excursions being carried on in a routine and perfunctory manner. Nevertheless, they had a strong force of cavalry in Alsace as well as Lorraine; but it was mostly in the rear, rarely much, never far in front. On the other hand, the Baden horsemen had looked, unseen themselves, into the French cavalry camp at Selz, and the scouts on the hills had signalled the successive arrival of battalions and artillery at Wissembourg. It must be stated, however, that the Germans did not know, precisely, until they came in contact with them, what forces were in, or were within reach of Wissembourg.