Black Hawk helicopters are expected to be part of the deal US officials have confirmed they intend to sell $60bn (£38bn) of arms to Saudi Arabia, including helicopters and jets
The state department said details of the deal had been sent to Congress, which now has 30 days to object.
Reports said the sale, which could be the most lucrative in US history, would support 75,000 jobs in the country.
Sources say the plan is part of a strategy to deal with the threat from Iran. The state department said Israel was not expected to raise objections.
State department official Andrew Shapiro said the weapons were critical for Saudi Arabia’s defence from threats such as al-Qaeda and Iran.
Analysts say the sale – which includes more than 80 F-15 fighters, and dozens of Apache, Black Hawk and Little Bird helicopters – is also unlikely to face much opposition from inside the US.
Pentagon officials say they expect the Saudis to initially select about $30bn worth of aircraft. Delivery of the weapons is expected to be spread over 15 to 20 years.
Saudi Arabia is one of the top buyers of weapons in the developing world.
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