Got it, thx. :-)

We have this scenario:
Germany has some sea units in a coastal zone near UK. England has no sea units at the time.

In england’s turn, the player buys a battleship(or any other sea unit) and places it in the sea zone where germany has it’s units.

In it’s turn, Unites states attacks that sea zone where there are both german and english units.

Do england units participate in the battle?