The sale package contained about 180 Paladin medium self-propelled howitzer systems, according to a statement released by the State Department. The artillery-firing vehicles launch 155mm shells.
The move came as visiting Saudi Arabian Crown Prince Mohammed bin Salman was wrapping up his weeks-long trip in the United States.
U.S. President Donald Trump, during his meeting with Salman at the White House on March 20, touted multi-billion-U.S.-dollar defense sale to Saudi Arabia.
On March 22, the Trump administration approved an arms sale of 1 billion U.S. dollars to Saudi Arabia, including about 6,700 U.S.-built anti-tank missiles.
U.S. lawmakers will have 30 days to act if they want to stop the latest sale.
More about: US Saudi-Arabia