Retreat rule verification

[Mallery29]

Scenario:
Attacked and conquered territory A.

Attacked territory B from territory C, and for whatever reason decide to retreat, can I retreat into A if A touches B and C?.  Or do I have to own it at the start of the turn?

Thanks.

[dan123]

You can only retreat into territories that at least one attacking unit came from.  So no, you cannot retreat into A.