Group 1 - The "West-2025" joint military exercise between Russia and Belarus is ongoing from December 12 to 16, 2025, aimed at enhancing military coordination and operational capabilities [1][2] - The exercise includes the use of Su-34 and Su-57 aircraft for simulated strikes and missile tests in the Barents Sea, indicating a focus on advanced military technology [1] - The exercise is perceived as a response to recent tensions, particularly following an incident involving Russian drones entering Polish airspace, which has raised concerns among NATO members [2][3] Group 2 - Poland has initiated its own military exercises, including the "Flame Storm" exercise, as a countermeasure to the Russian-Belarusian drills, involving approximately 30,000 troops [3] - NATO is increasing its defensive posture in Eastern Europe, with multiple countries participating in operations like "Eastern Sentinel" to bolster regional security [3] - The situation has led to heightened military readiness and deployments along the Polish-Belarusian border, with Poland announcing the closure of border crossings due to the exercises [2][3]