Hundreds of civilians, mostly in Iran, have been killed by dueling airstrikes despite international pleas for de-escalation.

President Donald Trump said the United will come down on Iran “at levels never seen before” if the Middle Eastern country attacks.

Former Vice President Mike Pence said on “State of the Union” Sunday that if Israel’s attack doesn’t somehow convince Iran to make major concessions in Trump’s diplomatic attempt to end its nuclear program, then the United States should be prepared to join the conflict.

Iran is often portrayed as one of the world’s most dangerous actors. But with attacks on its defenses, nuclear sites and proxy militias, Israel has exposed a compromised and weakened adversary.

President Donald Trump warned that "it's possible" that the United States "could get involved" in the ongoing Israel-Iran conflict if it continues to escalate during an exclusive interview with ABC News' Rachel Scott on Sunday (June 15).

While the U.S. insists it is not involved in strikes on Iran, American officials have confirmed military forces have been helping to intercept Iranian missiles fired at Israel.

The group is one of the most powerful and shadowy arms of Iran’s military, and it has long been on the front line of a shadow conflict with Israel.