<t> The province it retreated to fit the criteria for your new 1.9.16 Beta patch: - Units can now retreat from combat into enemy territory as long as the province into which they are retreating is adjacent to a province controlled by that player and that province contains no enemy units. (Units will ...

I'm using the new 1.9.4 Beta patch.

Have the retreat rules been changed from the manual? As the Union, I defeated two CSA divisions, and expected them to surrender, since there were no adjacent provinces under CSA control. Instead, they retreated to a province under Union control, from which they had moved the prior turn.