Award-winning historian Mark Stoler offers a complete diplomatic and military history of the U.S. and Britain during World War II. By examining the war and the unique relationship between Churchill and Roosevelt, Stoler emphasizes the unprecedented co-operation between Britain and the USA, but also challenges the standard Churchillian view of the ease of this historic alliance. There were many, often substantial disagreements between the two allies, and occasionally a formal agreement masked a continuing dispute in practice. This comprehensive history of the British-American effort offers a compelling new perspective on the intricacies and complexities of this unique and pivotal relationship.