One of the main concerns in the Western world was the significant threat Iraq posed to Saudi Arabia. Following Kuwait's conquest, the Iraqi Army was within easy striking distance of Saudi oil fields. Control of these fields, along with Kuwaiti and Iraqi reserves, would have given Saddam control over the majority of the world's oil reserves. Iraq also had a number of grievances with Saudi Arabia. The Saudis had lent Iraq some 26 billion dollars during its war with Iran. The Saudis had backed Iraq in that war, as they feared the influence of Shia Iran's Islamic revolution on its own Shia minority. After the war, Saddam felt he should not have to repay the loans due to the help he had given the Saudis by fighting Iran.

Acting on the Carter Doctrine policy, and out of fear the Iraqi Army could launch an invasion of Saudi Arabia, US President George H. W. Bush quickly announced that the US would launch a "wholly defensive" mission to prevent Iraq from invading Saudi Arabia, under the codename Operation Desert Shield. The operation began on 7 August 1990, when US troops were sent to Saudi Arabia, due also to the request of its monarch, King Fahd, who had earlier called for US military assistance. This "wholly defensive" doctrine was quickly abandoned when, on 8 August, Iraq declared Kuwait to be Iraq's 19th province and Saddam named his cousin, Ali Hassan Al-Majid, as its military-governor.

The US Navy dispatched two naval battle groups built around the aircraft carriers USS Dwight D. Eisenhower and USS Independence to the Persian Gulf, where they were ready by 8 August. The US also sent the battleships USS Missouri and USS Wisconsin to the region. A total of 48 US Air Force F-15s from the 1st Fighter Wing at Langley Air Force Base, Virginia, landed in Saudi Arabia and immediately commenced round-the-clock air patrols of the Saudi–Kuwait–Iraq border to discourage further Iraqi military advances. They were joined by 36 F-15 A-Ds from the 36th Tactical Fighter Wing at Bitburg, Germany. The Bitburg contingent was based at Al Kharj Air Base, approximately an hour south east of Riyadh. Much of the material was airlifted or carried to the staging areas via fast sealift ships, allowing a quick buildup. As part of the buildup, amphibious exercises were carried out in the Gulf, including Operation Imminent Thunder, which involved the USS Midway and 15 other ships, 1,100 aircraft, and a thousand Marines. In a press conference, General Schwarzkopf stated that these exercises were intended to deceive the Iraqi forces, forcing them to continue their defense of the Kuwaiti coastline.