Passage: On 19 December, the 28th Division command post transferred to Bastogne from Wiltz, a large Luxembourgish town to the southeast. At Wiltz, the division put up its last stand; 3rd Battalion of the 110th—supported by armor and artillery—arrived at the town around noon of that day. The 44th Engineer Battalion was set up north of the town, but they were soon overwhelmed and retreated into the town, blowing up a bridge behind them. This small force—numbering no more than 500 in total—held out until the evening, when their position became completely untenable and they retreated to the west. With the 110th Infantry completely destroyed as an effective combat unit, it would be up to the rest of the Allied army to defend Bastogne.

Question: The 44th Engineer Battalion was part of which military force??
Allied army