False: it was so they could raise revenue in the colonies
Although technically a draw, Edgehill was politically a Royalist victory. Rupert's cavaliers had routed most of the Parliamentary cavalry, and the king's forces had managed to stave off a serious 11th-hour attack. Then, too, King Charles was still astride the path to London.
Answer: President James Madison
The allies did a number of things to ensure the success of the D-Day invasion.
The key thing they did is work to convince the Germans that the invasion would come at Calais as opposed to the beaches at Normandy.