Despite opposite personalities, Thatcher bonded quickly with US President Ronald Reagan.
She gave strong support to the Reagan administration's Cold War policies based on their shared distrust of communism.
A sharp disagreement came in 1983 when Reagan did not consult with her on the invasion of Grenada.

During her first year as prime minister she supported NATO's decision to deploy US nuclear cruise and Pershing II missiles in Western Europe, permitting the US to station more than 160 cruise missiles at RAF Greenham Common, starting in November 1983 and triggering mass protests by the Campaign for Nuclear Disarmament.
She bought the Trident nuclear missile submarine system from the US to replace Polaris, tripling the UK's nuclear forces at an eventual cost of more than £12 billion (at 1996–97 prices).
Thatcher's preference for defence ties with the US was demonstrated in the Westland affair of 1985–86, when she acted with colleagues to allow the struggling helicopter manufacturer Westland to refuse a takeover offer from the Italian firm Agusta in favour of the management's preferred option, a link with Sikorsky Aircraft.
Defence Secretary Michael Heseltine, who had supported the Agusta deal, resigned from the government in protest.

In April 1986 she permitted US F-111s to use Royal Air Force bases for the bombing of Libya in retaliation for the alleged Libyan bombing of a Berlin discothèque, citing the right of self-defence under Article 51 of the UN Charter.
Polls suggested that fewer than one in three British citizens approved of her decision.

Thatcher was in the US on a state visit when Iraqi leader Saddam Hussein invaded Kuwait in August 1990.
During her talks with President George H. W. Bush, who succeeded Reagan in 1989, she recommended intervention, and put pressure on Bush to deploy troops in the Middle East to drive the Iraqi Army out of Kuwait.
Bush was apprehensive about the plan, prompting Thatcher to remark to him during a telephone conversation: "This was no time to go wobbly!"
Thatcher's government supplied military forces to the international coalition in the build-up to the Gulf War, but she had resigned by the time hostilities began on 17 January 1991.
She applauded the coalition victory as a backbencher, while warning that "the victories of peace will take longer than the battles of war".
It was later disclosed that Thatcher suggested threatening Saddam with chemical weapons after the invasion of Kuwait.
Despite opposite personalities, Thatcher bonded quickly with US President Ronald Reagan. She gave strong support to the Reagan administration's Cold War policies based on their shared distrust of communism. A sharp disagreement came in 1983 when Reagan did not consult with her on the invasion of Grenada.
During her first year as prime minister she supported NATO's decision to deploy US nuclear cruise and Pershing II missiles in Western Europe, permitting the US to station more than 160 cruise missiles at RAF Greenham Common, starting in November 1983 and triggering mass protests by the Campaign for Nuclear Disarmament. She bought the Trident nuclear missile submarine system from the US to replace Polaris, tripling the UK's nuclear forces at an eventual cost of more than £12 billion (at 1996–97 prices). Thatcher's preference for defence ties with the US was demonstrated in the Westland affair of 1985–86, when she acted with colleagues to allow the struggling helicopter manufacturer Westland to refuse a takeover offer from the Italian firm Agusta in favour of the management's preferred option, a link with Sikorsky Aircraft. Defence Secretary Michael Heseltine, who had supported the Agusta deal, resigned from the government in protest.
In April 1986 she permitted US F-111s to use Royal Air Force bases for the bombing of Libya in retaliation for the alleged Libyan bombing of a Berlin discothèque, citing the right of self-defence under Article 51 of the UN Charter. Polls suggested that fewer than one in three British citizens approved of her decision.
Thatcher was in the US on a state visit when Iraqi leader Saddam Hussein invaded Kuwait in August 1990. During her talks with President George H. W. Bush, who succeeded Reagan in 1989, she recommended intervention, and put pressure on Bush to deploy troops in the Middle East to drive the Iraqi Army out of Kuwait. Bush was apprehensive about the plan, prompting Thatcher to remark to him during a telephone conversation: "This was no time to go wobbly!" Thatcher's government supplied military forces to the international coalition in the build-up to the Gulf War, but she had resigned by the time hostilities began on 17 January 1991. She applauded the coalition victory as a backbencher, while warning that "the victories of peace will take longer than the battles of war". It was later disclosed that Thatcher suggested threatening Saddam with chemical weapons after the invasion of Kuwait.
Margaret Thatcher