President Biden has directed the Pentagon to begin removing some military capabilities and forces from the Gulf region in the first steps of an effort to realign the U.S. global military footprint away from the Mideast, changes that come as Saudi Arabia endures rocket and drone attacks from inside Yemen and Iraq, WSJ reports.

In moves that haven’t been previously reported, the U.S. has removed at least three Patriot antimissile batteries from the Gulf region, including one from Prince Sultan Air Base in Saudi Arabia, that had been put in place in recent years to help protect American forces.

Some capabilities, including an aircraft carrier and surveillance systems, are being diverted from the Middle East to answer military needs elsewhere around the globe, according to U.S. officials. Other reductions are under consideration, officials said.

The removal of Patriot batteries, the permanent aircraft-carrier presence and other military capabilities means that several thousand troops may leave the region over time. As of late last year there were about 50,000 U.S. troops in the region, down from a high of about 90,000 at the height of tensions between the Trump administration and Iran about two years ago.