“Multi-National Force” & “Commander-in-Chief” rules were both scrapped for the 2nd-Edition. Forces of multiple nations in the same land territory or seazone may still defend together, but may no longer attack together.
Oz, I did that to Panama. Even though we all know the rule it’s a good reminder.
There is also that slight thingee about the two sea zones on the very S. West of S. America being connected to the seazone about the caroline islands blow up box on the S. East most sea zone. It’s a blue blue moon when that gets used but……