The Grumman F4F Wildcat was the US Navy's primary carrier-based fighter aircraft during the beginning of World War II, it was mainly used during the Pacific War against Japan. Even though inferior to its Japanese counterpart, the Mitsubishi A6M, in terms of speed, manoeuvrability and range, the F4F was able to achieve kill ratios of up to 6.9:1, the reason for its success was an aerial combat tactic called "Thach Weave", developed by John S. Tach, the basic way in which the Thach Weave works, is that if for example two aircraft are being chased by enemies, two other are waiting behind, to then attack those enemies focused on the two other fighters, from behind.