French President Emmanuel Macron said on Friday that Russia must accept a proposed 30-day ceasefire deal put forward by the United States and Ukraine. Macron added he had discussed the situation on Friday with British Prime Minister Keir Starmer and Ukraine President Volodymyr Zelenskiy.

The last time Ukraine signed a peace accord with Russia, 10 years ago, it brought only sporadic violence, mounting distrust, and eventually full-scale war. Here’s what we can learn from that history.