The US recognize officially the political existence of the Soviet Union.

November 17, 1933
It is to be noticed that at that time all the great powers had already recognized the USSR

The US declare war to Germany despite their neutral situation up to this point in the first world war.

April 6, 1917

Roosevelt and Churchill sign the Atlantic Charter.

August 14, 1941

The Declaration by United Nations is signed by the Allies in Washington.

January 1, 1942

Launch of the Manhattan Project that produced the first atomic bomb.

1942

Truman Doctrine

March 12, 1947

Marshall Plan

June 5, 1947

The North Atlantic Treaty is established in Washington.

April 4, 1949

San Francisco Treaty about Japan's situation after the Second World War

September 8, 1951

American President Bush and Russian President Boris Yeltsin meet at Camp David to formally declare the end of the Cold War.

February 1, 1992

First American artificial satellite: beginning of the "Space race"

January 31, 1958

Congress passes the Tonkin Gulf resolution authorizing a direct military action in Southeast Asia (Vietnam war).

August 7, 1964

The US severs diplomatic relations with Cuba.

January 4, 1961
consequently to the decision taken by Fidel Castro to nationalize the Americans companies in Cuba

Cuban missile crisis

October 1962

The US acquire the Panama Canal Zone.

November 17, 1903

Kennedy: "Ich bin ein berliner"
Famous speech in which Kennedy repeats his support to West Germany.

June 26, 1963

Official opening of the first airline between New York and Moscow

July 15, 1968

Nixon is in Moscow for an official meeting.

May 22, 1972

The US and the Soviet Union sign the SALT I agreement.

May 26, 1972

Withdrawal of the last American troops in Vietnam.

March 29, 1973

Camp David Accords are signed by the Egyptian President and the Israeli Prime Minister, under the supervision of American President Jimmy Carter in Maryland.

September 17, 1978

Irangate : secret weapon sales from the US to Iran are revealed.

November 1987

The US bombs Afghanistan after the attacks on US embassies in Kenya and Tanzania.

August 1998

World Trade Center attacks

September 11, 2001

G.W. Bush : "The axis of evil"

January 2002

U.S declares war on Japan. A few day later, Germany and Italy declare war on the United States to which they reciprocate by declaring war to both countries, breaking their neutrality in the European conflict.

December 1941

Roosevelt, Churchill and Stalin meet at Yalta to discuss postwar occupation of Germany.

February 4-11, 1945

President Truman, without the approval of Congress, commits American troops to battle in the Korean War.

June 27, 1950