Ok, after some research other data emerged...
A friend tells me that in the book of Peter Taghon, "Belgique 44 : la libération", form the page 179 to 182 there are some references to the fighting in Liege-Rocourt area, and references to a combat between german and american tanks in the 7-8 september.
This picture is of a Pz IV destroyed in these combats :
And the text of Taghon is :
"A cause des barrages routiers américains érigés autour de Liège, beaucoup de matériel lourd fut perdu.
Dans la nuit du 7 au 8 septembre 1944, les Allemands attaquèrent le barrage du Combat Command R, sur la Place Reine Astrid, à Rocourt. Les G.I. mirent sept chars hors de combat. cette photo fut prise après la Libération.
Ce PanzerKampfwagen IV. ausf.H a déjà été pillé. L'écoutille, sur la plage avant, tout comme les plaques de blindage latérales, ont disparus. Il s'agit probablement d'un char de la 116e Panzer, qui évacua ses positions entre Herstappe et Rocourt, le 7 septembre et se replia pendant la nuit derrière la Meuse".
My French it's not very good, but I understand that a group of German tanks ran into a road block from "Combat Command R" in Rocourt in the night of 7-8 september 1944.
The 3 Armored division was the unit that liberated the city of Liege, then searching in the history of the 3AD I find this :
http://www.3ad.com/history/wwll/dugan.p ... elgium.htm
On 8 September Combat Command A mopped up the north side of Liege. Meanwhile Combat Command B cleared the south of the city. Two more German general officers were accounted for with one killed and one captured.
The division engineers constructed a 510 foot treadway bridge across the Meuse.
Much enemy equipment was destroyed trying to force road blocks that day and night. The personnel of one road block in Combat Command B zone accounted for 35 enemy vehicles, killing a lieutenant general as he tried to run the block in a high powered staff car; another, manned by Division Reserve, got seven MK IV tanks.
And that was the "Combat Command R" or "CCR", in another part the history of the 3AD says :
Combat Command A (Hickey) swept forward in two columns and got off to a good start. Then the fast-moving tankers were hit by counterattacking Germans near Ranes. The enemy closed on all sides and surrounded the combat command, isolating it from the Division. This was not unusual for the front-running tankers, and CCA coolly fought its way forward. At this point the Division Reserve (also called CCR) went into action. In the 3rd Armored the Division Reserve consisted of the detached battalions not with CCA or CCB.
Then, the "US Forces" mentioned in "Panzerwrecks #6" were almost certainly part of the "CCR" or "Combat Command R" of the 3AD...
Anyone has more information about this encounter?...