1972 — India and Pakistan sign a peace accord, renaming the ceasefire line in Kashmir as the Line of Control, a heavily fortified stretch of military outposts that divide the region between them. Both sides deploy more troops along the frontier, turning it into a heavily fortified stretch of military outposts.

New developments in the nuclear powers’ harrowing four-day conflict, along with entrenched religious nationalism on each side, could signal more frequent battles ahead.