Who Are the Houthis and Why Is the U.S. Attacking Them?

Since mid-November, the Houthis, a Yemeni rebel group backed by Iran, have launched dozens of attacks on ships sailing through the Red Sea and the Suez Canal, a crucial shipping route through which 12 percent of world trade passes.

The United States and a handful of allies, including Britain, struck back, carrying out missile strikes on Houthi targets inside Yemen early Friday local time and thrusting the rebels and their long-running armed struggle further into the limelight.

The attack on Houthi bases came a day after the United Nations Security Council voted to condemn “in the strongest terms” at least two dozen attacks carried out by the Houthis on merchant and commercial vessels, which it said had impeded global commerce and undermined navigational freedom.

Here’s a primer on the Houthis, their relationship with Hamas and the attacks in the Red Sea.

Who are the Houthis?

The Houthis, led by Abdul-Malik al-Houthi, are an Iran-backed group of Shiite rebels who have been fighting Yemen’s government for about two decades and now control the country’s northwest and its capital, Sana.

They have built their ideology around opposition to Israel and the United States, seeing themselves as part of the Iranian-led “axis of resistance,” along with Hamas in the Gaza Strip and Hezbollah in Lebanon. Their leaders often draw parallels between the American-made bombs used to pummel their forces in Yemen and the arms sent to Israel and used in Gaza.

In 2014, a military coalition led by Saudi Arabia intervened to try to restore the country’s original government after the Houthis seized the capital, starting a civil war that has killed hundreds of thousands.