When U.S. President Donald Trump tweeted, on May 10, that India and Pakistan had agreed to a cease-fire, the world breathed a sigh of relief. The two nuclear-armed neighbors had teetered perilously close to all-out war as they fired missiles and drone strikes at each other’s military installations and religious sites over the previous three days.

The escalating conflict between India and Pakistan, two neighbors who have been rivals for decades, erupted in the early hours of Wednesday morning when New Delhi launched missiles across the border.