A lot has happened in just a year on both sides of the Lebanon-Syria border. A lightning offensive by Islamist insurgents in Syria toppled longtime autocrat Bashar Assad and brought a new government in place in Damascus.

In Lebanon, a bruising war with Israel dealt a serious blow to Hezbollah — the Iran-backed and Assad-allied Shiite Lebanese militant group that had until recently been a powerful force in the Middle East — and a U.S.-negotiated deal has brought a fragile ceasefire.