Russia struck a sedate tone on Friday but acknowledged grounds for cautious optimism, after only backing the "idea" of a U.S. brokered 30-day ceasefire with firm caveats.

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.

Foreign ministers from the G7 nations reached a deal on a joint statement aimed at showing unity on Friday that backed Ukraine's territorial integrity and warned Russia to follow Kyiv in accepting a ceasefire or face possible further sanctions.