The original strike force was weakened when two army corps were diverted to the Eastern Front.
This battle ended when a Chief of Intelligence found both the First and Second army headquarters in turmoil, and ordered a retreat towards Soissons. The original strike force was weakened when two army corps were diverted to the Eastern Front. General von Kluck was unnerved by the slow advance of the British Expeditionary Force into the gap which had opened between his left flank and von Bulow's right. Earlier, the first use of motorized infantry had occurred when a desperate General Maunoury was rescued by forces in taxicabs. For ten points, name this early battle of World War I on a namesake river.
This battle ended when a Chief of Intelligence found both the First and Second army headquarters in turmoil, and ordered a retreat towards Soissons.
{First} Battle of the {Marne}