In the long choreography of alliance and deterrence on the Korean Peninsula, South Korea and the United States have agreed to cut short their joint military exercises at Washington's request, ending Friday rather than August 27. President Trump, citing warmer signals from Pyongyang and Seoul's absence from American operations against Iran, ordered the reduction before the drills had even begun. The decision reflects a broader recalibration — one that weighs diplomatic gesture against military readiness, and tests how much an alliance can bend before its foundations shift.