Russia and Ukraine traded heavy aerial blows overnight Saturday, with both sides reporting more than 100 enemy drones over their respective territories.

The former maintains it should end as quickly as possible with a negotiated settlement, whereas most EU and European leaders continue to demand Ukrainian battlefield victory and argue that “peace in Ukraine is actually more dangerous than the war.

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.