 Also, the "Tatmadaw" leadership was concerned that foreign powers might arm the insurgents on the border to exploit the political situation and tensions in the country.This new threat perception, previously insignificant under the nation's isolationist foreign policy, led "Tatmadaw" leaders to review the defence capability and doctrine of the "Tatmadaw".The third phase was to face the lower level external threats with a strategy of strategic denial under total people's defence concept.