Instead, the 1st Army struck eastward, heading for Giessen and the Lahn River,  beyond Remagen, before turning north toward Paderborn and a linkup with the 9th Army. All three corps of the 1st Army participated in the breakout, which on the first day employed five infantry and two armored divisions.
The 1st Army's eastward movement, aiming for Giessen and the Lahn River beyond Remagen, before turning north towards Paderborn to link up with the 9th Army, was a key part of the breakout on the first day, which involved five infantry and two armored divisions.