Saturday began with the looming specter of full-blown war between India and Pakistan. It ended with an evening ceasefire announcement by President Donald Trump. Here's a look at how events unfolded.

The fact that India and Pakistan were able to agree to a ceasefire as escalations spiralled is reason for optimism. It shows that internal calculations and international pressure can pull the two parties back from the brink. However, the ceasefire represents an incredibly precarious peace. Can it be sustained?

Pakistani officials have said Saturday’s ceasefire with India reestablished deterrence. But New Delhi insists the rules of engagement have irrevocably changed.