The Lebanese militant group’s next leader will confront the most challenging moment in the organization’s four-decade history.

Hezbollah's media office did not respond to a request for comment for this story. U.S. President Joe Biden on Saturday called Nasrallah's killing "a measure of justice" for his many victims, and said the United States fully supported Israel's right to defend itself against Iranian-backed groups.

The severity of Israel’s attacks have called into question the very reason for the organization's existence, which was predicated on deterring Israeli attacks against Lebanon and Iran.