|When the war began a number of "legions" were fielded. These were combined arms units, usually of regimental size but in some cases battalion size, of infantry, cavalry, and artillery. This seems to have been an idea that was ahead of it't time, since most were later disbanded with the individual components re-assigned at higher levels.
What was it that made the "combat team" approach unworkable at lower levels? Was just the size and scope of the linear battlefield just too big at the time? That seems like an obvious answer so am I missing something?