Live updates: Attacks by Israel and Hezbollah, war in Gaza

Hezbollah's main base is on the Israeli-Lebanese border, where there have been almost daily clashes between the militant group and Israel since the start of the Gaza war.

Here you can learn more about their Decades-long conflict

Israeli Invasion: When Israel invaded Lebanon in 1982, it captured almost half of the territory, including Beirut, where Israeli forces joined forces with right-wing Christian Lebanese militias allied with Israel to lay siege to the western part of the capital in an effort to drive out Palestinian militants.

According to reports and an Israeli investigation into a massacre in a refugee camp in Beirut, Israel's operation claimed the lives of over 17,000 people. The investigation indirectly blamed Israel for the massacre, which was carried out by Christian Lebanese fighters.

The rise of Hezbollah: As hordes of Palestinian fighters left Lebanon, a group of Shiite Islamist fighters trained by Iran emerged. In 1983, two suicide bombers linked to this group attacked a U.S. Marine barracks in Beirut, killing nearly 300 American and French soldiers and civilians.

A year later, Iranian-linked militants bombed the US embassy in Beirut, killing 23 people. In 1985, these militants joined together to form a newly founded organization: Hezbollah.

Support for Gaza: Hezbollah is part of a larger Iranian-led alliance of militant groups in Yemen, Syria, Gaza and Iraq. Since the beginning of the war with Hamas, it has increasingly clashed with Israel and its allies. This alliance has vowed to continue these conflicts until the end of the war.

Killing an important leader: Tensions escalated when Israel announced in July that it had killed Hezbollah's top military commander, Fuad Shukr, in an attack on Beirut. In retaliation, Hezbollah fired hundreds of drones and rockets at Israel.

Displaced residents: The increase in cross-border fighting has forced people in Israel and Lebanon to flee their homes. On Tuesday, Israel declared the return of tens of thousands of residents of northern Israel to their homes near the border its new war target. More than 100,000 people have been displaced from southern Lebanon.