In this context, the North Atlantic Convention began to adjust its military strategy.On 28 May 1991 (April 15, 1991) NATO adjusted its military strategy.In 1990 Eastern Europe changed dramatically, the Yalta system broke down, and Warsaw broke down.In this context, the North Atlantic Convention began to adjust its military strategy.In July 1990, NATO issued the London Declaration, which declared that NATO turned from a military-political organization to a political-military organization, and decided to take a series of "enemy-friendly" proactive actions, spreading olive branches to the Soviet Union and Eastern Europe.On 28 May 1991, the Ministers of Defense of the Northern States held a meeting in Brussels, drawing up a new NATO military strategy.From the original strategy of "defense against the Soviet Union" to "complete