Yes, if America decides to try and move through SZ 60 with those ships in the combat movement phase, they will have to stop and engage the defending enemies. However, if you clear them out and then try to move your ships through on non-combat they can sail through.
Question: Combat Move from a Hostile Sea Zone
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So I have a question about what moves are allowed in the following situation:
England has a fleet in the Baltic Sea region (forgive me I don’t remember the SZ no.), which includes transports. Germany purchases submarines on its turn, making the SZ hostile.
Can england use its transports to move out of the hostile zone, pick up troops, and then move back in to the hostile zone (and then conduct an amphibious assault as normal if the subs are defeated) or must the transports, if they retreat, end up in a friendly sea zone? Further (and related) are there ANY restrictions on movement caused by starting in a hostile zone rather than a friendly?
Thanks.
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Can england use its transports to move out of the hostile zone, pick up troops, and then move back in to the hostile zone (and then conduct an amphibious assault as normal if the subs are defeated) or must the transports, if they retreat, end up in a friendly sea zone?
Yes, this is legal, as long as the sea zone in which the transports are loading units is friendly.
Further (and related) are there ANY restrictions on movement caused by starting in a hostile zone rather than a friendly?
The movement must be done in the Combat Movement phase. It must follow all of the rules for Combat Movement, except that it need not end in combat.