RIO DE JANEIRO: South Korea was given prior notice by the United States on its reported decision to allow Ukraine to use long-range missiles to strike inside Russia, the presidential office said Monday. This development marks a significant shift in the ongoing conflict, as the war has now entered a new phase with North Korean troops reportedly engaging in combat operations alongside Russian forces. According to Yonhap News Agency, U.S. President Joe Biden has reportedly given the green light for Ukraine to utilize the Army Tactical Missile System (ATACMS) weapons. This decision is seen as a strategic move amidst the escalating tensions and the complex geopolitical landscape involving multiple nations. The involvement of North Korean troops alongside Russian forces adds another layer of complexity to the situation, raising concerns about the potential for further escalation.