The earlier point (and a comon one) was that England and later Britain hasn't been SUCCESSFULLY invaded since 1066. 1066 was a war that England lost to the point that the government was over-thrown. after that (with the exception of civil war) England and Britain have never been taken over. - Yes there have been many battles - even successful ones on English soil, but the English have always been able to eventually win whatever war that was going on.

This can encompass the battles with the Scots, although it is usually the shores of Britain that are mentioned with invasion. And the Scots never over threw the government (although they did end up adding their blood-line to the English throne. But James the Vi (James I of England) wasn't much of a Scot, if you ask me (which you haven't)

For that matter the United States and Canada both have never been successfully invaded, though our histories are a bit shorter.

pax yall