The United States has sealed an arms deal to Saudi Arabia, the White House announced on Saturday, a move that solidifies its decades-long alliance with the world’s largest energy producer just as President Donald Trump begins an official visit to the country.

The agreement, which is worth $350 billion over 10 years and $110 billion that will take effect immediately, was hailed by the White House as “a significant expansion of…[the] security relationship” between the two countries.

Simultaneously, Saudi Arabia is in a broad-based push for economic reform, and as part of that effort signed a flurry of deals with private U.S. companies worth tens of billions of dollars.

Lockheed Martin, one of the world’s largest defense contractors whose technology was part of the U.S-Saudi accord, said in a statement that the deal “will directly contribute to [Saudi Arabia’s] Vision 2030 by opening the door for thousands of highly skilled jobs in new economic sectors.”

The arms package represents an enhancement of Saudi Arabia’s military capabilities as tensions flare in the region, with the U.S. viewing the Saudis as a linchpin in efforts to check the global ambitions of Iran. The country, the hub of Islam’s most revered sites, but is also a target of radical Islamic extremism.

“This package of defense equipment and services support the long-term security of Saudi Arabia and the Gulf region in the face of Iranian threats, while also bolstering the Kingdom’s ability to contribute to counter terrorism operations across the region, reducing the burden on the U.S. military to conduct those operations,” the White House said in a statement.

Source: CNBC