WWII Europe

Hi, not sure where to post this question, did a search and came up with no answer.
In the WWII Europe map, where does one attack section UK3 from? Everywhere I place troops, nothing works. I have eliminated the other troops in England, but they just go to "n1" and I cannot bring troops into England to attack UK3. Thanks for the help, if there are better areas to post questions like this, please advise.
In the WWII Europe map, where does one attack section UK3 from? Everywhere I place troops, nothing works. I have eliminated the other troops in England, but they just go to "n1" and I cannot bring troops into England to attack UK3. Thanks for the help, if there are better areas to post questions like this, please advise.