Two commanders in this battle, Keith Park and Trafford Leigh-Mallory, disagreed about the use of "Big Wing" squadrons during it. It was fought after the issuance of Directive No. 16 and included a climactic skirmish later known as "The Hardest Day." This battle, intended as a precursor to Operation Sea Lion, included the "never was so much owed by 
Two commanders in this battle, Keith Park and Trafford Leigh-Mallory, disagreed about the use of "Big Wing" squadrons during it. It was fought after the issuance of Directive No. 16 and included a climactic skirmish later known as "The Hardest Day." This battle, intended as a precursor to Operation Sea Lion, included the "never was so much owed by so many" speech. After this battle, the losers began "The Blitz," which included V-2 rocket attacks. For 10 points, name this 1940 battle between the RAF and the Luftwaffe for air supremacy over England.
Two commanders in this battle, Keith Park and Trafford Leigh-Mallory, disagreed about the use of "Big Wing" squadrons during it.
Battle of Britain [or Operation Sea Lion before mentioned; accept answers including air battle and Great Britain or England or United Kingdom or UK before "air supremacy"]