A ceasefire deal that went into effect on Wednesday could end more than a year of cross-border fighting between Israel and Lebanon’s Hezbollah militant group, raising hopes and renewing difficult questions in a region gripped by conflict.

In what might be his final achievement as president, Joe Biden, his diplomats, and their French counterparts have brokered a ceasefire in the increasingly brutal yearlong war between Israel and Hezbollah’s Islamist militia in Lebanon.

The ceasefire agreement between Israel and Hezbollah is a major diplomatic breakthrough that follows 13 months of escalating conflict, upheaval and displacement in Lebanon.