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Declaration of Independence
A declaration that states that the thirteen colonies were independent and no longer under British rule. -
Louisiana Purchase
A land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million. -
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War of 1812
The United States took on the greatest naval power in the world, Great Britain, in a conflict that would have an immense impact on the young country's future. Causes of the war included British attempts to restrict U.S trade and etc. -
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Mexican/American War
The first U.S. armed conflict chiefly fought on foreign soil. -
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Spanish-American War
The Spanish–American War was fought between the United States and Spain in 1898. -
Panama Canal
An artificial waterway in Panama that connects the Atlantic Ocean and with the Pacific Ocean. -
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WWI
The First World War, the Great War, or the War to End All Wars, was a global war originating in Europe. -
Zimmerman Telegram
A secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico. -
Battle of Cantigny
Was the first major American battle and offensive of World War I -
Battle of Chateau-Thierry
It was one of the first actions of the American Expeditionary Forces under General John J. "Black Jack" Pershing. -
Dawes Plan
Formulated to take Weimar Germany out of hyperinflation and to return Weimar’s economy to some form of stability. -
Kellogg-Briand Pact
An international agreement in which signatory states promised not to use war to resolve "disputes or conflicts of whatever nature or of whatever origin they may be, which may arise among them." -
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The Great Depression
A long and severe recession in an economy or market. -
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Neutrality Acts
Laws passed in 1935, 1936, 1937, and 1939 to limit U.S. involvement in future wars. -
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WWII
Known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. -
Pearl Harbor
The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service against the United States naval base at Pearl Harbor. -
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Battle of Iwo Jima
The Battle of Iwo Jima was a major battle in which the United States Marine Corps landed on and eventually captured the island of Iwo Jima from the Imperial Japanese Army during World War II. -
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Battle of Okinawa
A major battle of the Pacific War fought on the island of Okinawa by United States Marine and Army forces against the Imperial Japanese Army. -
United Nations
The United Nations is a global organization that brings together its member states to confront common challenges. -
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Cold War
The Cold War was a state of geopolitical tension after World War II between powers in the Eastern Bloc and powers in the Western Bloc -
Rio Pact
It was signed in the Brazilian city of Rio de Janeiro, defends the principle of non-interventionism in the internal affairs of the region's democracies and proclaims regional solidarity for any member attacked from abroad. -
Marshall Plan
An American initiative to aid Western Europe, in which the United States gave over $13,000,000,000 in economic assistance to help rebuild Western European economies after the end of World War II -
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Berlin Blockade
One of the first major international crises during the Cold War. The Soviet Union blocked the Western Allies' railway, road, and canal access to the sectors of Berlin under Western control. -
NATO
The North American Treaty Organization. An intergovernmental military alliance between several North American and European countries based on the North Atlantic Treaty. -
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Korean War
A war between North Korea and South Korea. -
Warsaw Pact
A pact signed by the Soviet Union and its Communist military allies in Europe. -
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Vietnam War
A conflict that occurred in Vietnam, Laos, and Cambodia -
International Atomic Energy Agency
The International Atomic Energy Agency is an international organization that seeks to promote the peaceful use of nuclear energy. -
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Bay of Pigs
A failed military invasion of Cuba undertaken by the CIA. -
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Berlin Wall
The Berlin Wall was a guarded concrete barrier that physically and ideologically divided Berlin. -
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Cuban Missile Crisis
Leaders of the U.S. and the Soviet Union engaged in a tense, 13-day political and military standoff in October 1962 over the installation of nuclear-armed Soviet missiles on Cuba. -
Non-Proliferation Treaty (NPT)
An international treaty whose objective is to prevent the spread of nuclear weapons and weapons technology and promote cooperation in the peaceful uses of nuclear energy -
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Detente
A foreign policy of the U.S presidents Nixon and Ford. It was a "thawing out" period during the middle of the cold war in efforts to avoid collision of nuclear risks. -
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SALT I&II
Two rounds of bilateral conferences and corresponding international treaties involving the United States and the Soviet Union, the Cold War superpowers, on the issue of arms control. -
Camp David Accord
Agreements between Israel and Egypt signed on September 17, 1978, that led in the following year to a peace treaty between those two countries. -
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Persian Gulf War
The Gulf War, codenamed Operation Desert Shield for operations leading to the buildup of troops and defense of Saudi Arabia and Operation Desert Storm in its combat phase. -
NAFTA
North American Free Trade Agreement
An agreement signed by Canada, Mexico, and the United States, creating a trilateral trade bloc in North America. -
World Trade Organization
An international organization designed by its founders to supervise and liberalize international trade. -
9/11
Three commercial planes were hijacked. Two of them crashed into the World Trade Center and the third crashed into a side of the Pentagon. -
War on Terror
An international military campaign that was launched by the U.S. government after the September 11 attacks in the U.S. in 2001. -
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Iraq war
A protracted armed conflict that began with the invasion of Iraq by a United States-led coalition that overthrew the government of Saddam Hussein.
