The area around the bridges has been turned into a hellscape, littered with burning tanks and dead men. With the road cut at Son and their offensive stalled, Operation Market Garden is unlikely to resume and the men at Arnhem bridge are lost.
* This result is better than the historical one. In real life, the attack on Nijmegen on the 19th failed, forcing the allies to mount a desperate river crossing the next day. In this alternate situation, an outcome like that is unlikely.

