Also the speed of the advance after the months of deadlock in Normandy was unexpected.
Yep.
Borrowing from some research and drafting I originally did for "The Chieftain's Hatch" a few years back …
The originally planned timeline for the post-landing offensives in ETO had been drawn up by Field Marshall Montgomery (in charge of planning for the land campaign). The plan was built on a series of phase lines. It called for reaching the phase line of the river Seine by D+90 (4 September), and then pausing to assemble sufficient manpower and materiel to force a crossing of this major obstacle, which was expected to be one of the Germans' main defensive lines. Please keep that in mind as we assess just how unexpected the speed of advance might have been.
Now compare the dates that formed the expectations to these:
1 August: US Third Army breaks out of the Normandy boccage country at Avranches.
19 August: US 79th Infantry Division, of XV Corps / Third Army, reaches the Seine at Mantes-Gassincourt, about 20 miles "above" (north-west of) Paris. That same night General Bradley approves General Patton's plan for crossing and establishing a bridgehead.
20 August: The bulk of 79th Division crosses the Seine with 3 infantry regiments, a tank battalion, a tank destroyer battalion, AA and artillery. Advanced patrols capture an underground bunker command post of German Army Group B at La Roche Guyon.
22 August: Canadian First Army closes the Falaise gap, trapping about 60,000 troops of Army Group B. Army Group B is left with only about 30,000 troops, 314 guns, and about 60 tanks. These are ordered to withdraw over the Seine via ferries at Rouen to set up a defensive line, while leaving a bridgehead on west bank of the Seine as a rearguard. This rearguard prevents a rapid crossing by British 21st Army Group, but is not positioned to pose any obstacle to US 12th Army Group.
On that same day the US 5th Infantry Division of XX Corps crosses Seine at Fontainebleau below Paris.
The Seine itself is no longer a geographical barrier.
23 August: US 10th Infantry Division, 11th Infantry Division, and 7th Armored Division all make crossings of the Seine.
25 August: By this time the US 12th Army Group has five firm and consolidated bridgeheads over Seine: one above Paris, and four below.
Recognizing the hopelessness of his position, and contrary to explicit orders from Hitler, the German commander of the Paris garrison, General von Cholitz, surrenders the city to the General Leclerc's French 2nd Armoured Division (operating with US First Army). All of the bridges over the Seine within the city are intact.
30 August: The last German unit retreats across the Seine.
31 August – 2 September : US XIX Corps advances to the Belgian boarder – US 2nd Armored on left, 79th Infantry in center, 30th Infantry on right all move together. 79th Infantry Division advances from Mouy to St. Armand, then crosses into Belgium, pushing a salient 180 miles deep into enemy territory, in a period of 72 hours.
Once the deadlock of the Normandy boccage was overcome, once the US Army had achieved freedom of maneuver, it moved so quickly, overcoming or by-passing German positions so rapidly, that the Germans could not organize a defense.
It was all working. The paper specifications may have said that the Germans should be able to stop the American tanks, but it seems that nobody told the crews of the M4s this.
In the US Army the armored divisions, and even the infantry divisions, had a level of mobility that no other army could match (although the British and Commonwealth came very close). The US Army was not bound to the rail infrastructure. That was a good thing, as the allied air forces had spent months pulverizing the rail lines and marshalling facilities across Europe, and particularly across France.
This is the environment in which the Red Ball Express was created. The US Army had enough trucks in ETO to move entire divisions by road (though not every division at once). The artillery was motorized, unless it was self-propelled (which was even better). And the supply echelons were motorized. The challenge on the ground was that the distances were greater, as the front was moving FAR faster than had been planned. The ports up the coast were not being taken as quickly.
Marshalling the trucks and organizing the routes was an entirely reasonable (and appropriate) response, in my mind. It meant that everything that was not a motor vehicle moved as cargo in a motor vehicle.
Again, the question for me is -- what is the screw-up that is suggested here?
-Mark
(aka: Mk 1)