-
Due to the global warming, the ice caps melted and the water level rose, sinking the connecting part of Britain and the mainland under sea level.
-
-
-
This ear he invaded first and lost due to the shallow waters surrounding England which prevented them from setting foot on land. A year later, he succeeded in his endeavors
-
In order to support the more vital parts of the Roman empire on the mainland, which were being raided by barbarian troops.