Iran-aligned Iraqi armed group Kataib Hezbollah warned on Sunday it would resume attacks on U.S. troops in the region if the United States intervenes in the conflict between Israel and Iran.

Salami was killed in the first Israeli strikes, along with other key commanders. Although Iran replaced the commanders quickly, it took hours for it to get its ballistic missiles ready for launch. Over the last four days, Iran has much of its missile arsenal and the launchers needed to fire them.

After mulling such action for 16 years, Israel has launched air strikes on Iran’s nuclear facilities – a mission fraught with peril not just for the Jewish state, but for the broader Middle East.

The conflict, the most intense fighting between the two countries in decades, has been met in the United States with feelings of “frustration and helplessness,” as well as heartbreak.

The deadly conflict between Israel and Iran has entered a fourth day, with both sides firing waves of missiles overnight. Follow for live updates.

A volley of missiles launched by Iran killed eight people and injured nearly 100 in Israel on Monday as the conflict between the two countries entered its fourth day.

Israel decimated the group’s leadership last fall and degraded its military capabilities. Can the same strategy work against a far more powerful foe?

The Lebanese militant group Hezbollah was long considered Iran’s first line of defense in case of a war with Israel