The shadow government of Burma (also known as Myanmar), formed by opponents of military rule, called for a nationwide uprising against the junta on Tuesday, amid reports of new protests and a flare-up in fighting between the army and ethnic military groups. Duwa Lashi La, acting president of the National Unity Government (NUG), said the shadow government was launching a “people’s defensive war,” signaling in a speech what appeared to be a bid for greater coordination of armed militias and ethnic forces after months of fighting the military. Military spokesman Zaw Min Tun dismissed the NUG’s call for revolt. It was an attempt to gain international attention and recognition from the United Nations General Assembly later this month and would not succeed, he said. Burma’s military toppled the elected government of Aung San Suu Kyi on Feb. 1, triggering a wave of protests by pro-democracy supporters, and leading to hundreds …