Question: if the British are able to use a port for supply, can the Americans now use their beach heads and the British beach heads to relieve the supply situation?
YES you can do this. But remember that each Beachhead marker can only give supply to ONE Army.
F. Beachhead Marker. When checking Supply, each
Beachhead marker can be a Supply Source for only
two SPs worth of units of one army (green or tan).
The cost is one SP per square counter, but two SPs
if it displays an oil drum icon ( ), as such units are