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Revolutionary War starts
The Battles of Lexington and Concord, also called the Shot Heard 'Round the World, were the first military engagements of the American Revolutionary War. -
Signing of Declaration of Independence
The Declaration of Independence was approved by the Second Continental Congress on July 4, 1776, but it was not signed until almost a month later. The Congress did not have the approval of all 13 colonies until July 9, 1776. -
Articles of Confederation
The Articles of Confederation were adopted by the Continental Congress on November 15, 1777. This document served as the United States' first constitution. It was in force from March 1, 1781, until 1789 when the present-day Constitution went into effect. -
American Revolutionary War ends
Congress ratified preliminary articles of peace ending the Revolutionary War with Great Britain on April 15, 1783. On September 3, 1783, the Treaty of Paris was signed, bringing the Revolutionary War to its final conclusion. -
Constitution Created
On September 17, 1787, 39 of the 55 delegates signed the new document, with many of those who refused to sign objecting to the lack of a bill of rights. At least one delegate refused to sign because the Constitution codified and protected slavery and the slave trade. -
Constitution ratifed
Written in 1787, ratified in 1788, and in operation since 1789, the United States Constitution is the world's longest surviving written charter of government. -
Louisiana Purchase
The Louisiana Purchase encompassed 530,000,000 acres of territory in North America that the United States purchased from France in 1803 for $15 million. -
War of 1812
The War of 1812 was fought by the United States of America and its indigenous allies against the United Kingdom and its allies in British North America, with limited participation by Spain in Florida. -
Trail of Tears
The Trail of Tears was an ethnic cleansing and forced displacement of approximately 60,000 people of the "Five Civilized Tribes" between 1830 and 1850 by the United States government. -
Annexation of Texas
On December 27, 1845, U.S. President James K. Polk signed the annexation bill into law and formally recognized Texas as the 28th state of the Union. -
Mexican American War
The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the Intervención estadounidense en México, was an armed conflict between the United States and Mexico from 1846 to 1848. It followed the 1845 American annexation of Texas, which Mexico still considered its territory. -
California Gold Rush
The California Gold Rush was a gold rush that began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. The news of gold brought approximately 300,000 people to California from the rest of the United States and abroad. -
Gadsden Purchase
The Gadsden Purchase is a 29,640-square-mile region of present-day southern Arizona and southwestern New Mexico that the United States acquired from Mexico by the Treaty of Mesilla, which took effect on June 8, 1854. -
Pig War
The Pig War was a confrontation in 1859 between the United States and the United Kingdom over the British–U.S. border in the San Juan Islands, between Vancouver Island and the State of Washington. The conflict was named "the Pig War" because it was triggered by the shooting of a pig. -
American Civil War
The Civil War started because of uncompromising differences between the free and slave states over the power of the national government to prohibit slavery in the territories that had not yet become states. -
Purchase of Alaska
On March 30, 1867, the United States reached an agreement to purchase Alaska from Russia for a price of $7.2 million. The Treaty with Russia was negotiated and signed by Secretary of State William Seward and Russian Minister to the United States Edouard de Stoeckl -
Spanish-American War
The Spanish–American War began in the aftermath of the internal explosion of USS Maine in Havana Harbor in Cuba, leading to United States intervention in the Cuban War of Independence. -
Annexation of Hawaii
On July 7, 1898, the Hawaiian Islands were annexed by this joint resolution. When the Hawaiian islands were formally annexed by the United States in 1898, the event marked the end of a lengthy internal struggle between native Hawaiians and non-native American businessmen for control of the Hawaiian government. -
Philippine–American War
The Philippine–American War, known alternatively as the Philippine Insurrection, Filipino–American War, or Tagalog Insurgency, was fought between the First Philippine Republic and the United States from February 4, 1899, until July 2, 1902. -
Panama Canal given to the USA
In 1903, Panama declared its independence from Colombia in a U.S.-backed revolution and the U.S. and Panama signed the Hay-Bunau-Varilla Treaty, in which the U.S. agreed to pay Panama $10 million for a perpetual lease on land for the canal, plus $250,000 annually in rent. -
World War 1
The USA entered the war on April 6, 1917 because Wilson cited Germany's violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, as well as its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war. World War 1 ended on November 11, 1918 -
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The Great Depression
The Great Depression was an economic shock that impacted most countries across the world. It was a period of economic depression that became evident after a major fall in stock prices in the United States. The economic contagion began around September and led to the Wall Street stock market crash of October 24. -
World War 2
The United States joined World War 2 when Japan bombed Pearl Harbor on December 7, 1941 the war ended in 1945 -
United Nations Creation
The United Nations, referred to informally as the UN, is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and serve as a centre for harmonizing the actions of nations -
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Cold War
The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. -
Creation of NATO
The foundations of the North Atlantic Treaty Organization (NATO) were officially laid down on 4 April 1949 with the signing of the North Atlantic Treaty, more popularly known as the Washington Treaty. The Washington Treaty – or North Atlantic Treaty – forms the basis of the North Atlantic Treaty Organization – or NATO. -
Korean War
America wanted not just to contain communism - they also wanted to prevent the domino effect. Truman was worried that if Korea fell, the next country to fall would be Japan, which was very important for American trade. -
Vietnam War
The United States entered Vietnam with the principal purpose of preventing a communist takeover of the region. In that respect, it failed: the two Vietnams were united under a communist banner in July 1976. Neighbouring Laos and Cambodia similarly fell to communists. -
Apollo 11
Apollo 11 was the American spaceflight that first landed humans on the Moon. Commander Neil Armstrong and lunar module pilot Buzz Aldrin landed the Apollo Lunar Module Eagle on July 20, 1969, at 20:17 -
Gulf War
The invasion of Kuwait led to a United Nations Security Council embargo and sanctions on Iraq and a U.S.-led coalition air and ground war, which began on January 16, 1991, and ended with an Iraqi defeat and retreat from Kuwait on February 28, 1991. -
9/11
A terrorist attack that targeted The Twin Towers, The Pentagon and one plane crashed in Pennsylvania field it shocked the world the terrorist group that attacked the USA was Al-Qaeda -
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War in Afganhistan
The War in Afghanistan was an armed conflict from 2001 to 2021. It began when an international military coalition led by the United States launched an invasion of Afghanistan, toppling the Taliban-ruled Islamic Emirate and establishing the internationally recognized Islamic Republic three years later -
Iraq War
The primary rationalization for the Iraq War was articulated by a joint resolution of the United States Congress known as the Iraq Resolution. The US claimed the intent was to "disarm Iraq of weapons of mass destruction, to end Saddam Hussein's support for terrorism, and to free the Iraqi people".the war ended Dec 15, 2011 -
Covid-19
The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic ... concern on 30 January 2020, and a pandemic on 11 March 2020. -
US innervation in Russian-Ukrainian War
The response of the United States to the ongoing Russian invasion of Ukraine that began in 2022 has been in favor of Ukraine. President Biden condemned the invasion, providing humanitarian and military aid to Ukraine, and sanctioning Russia and Belarus, the countries heavily involved in invading Ukraine.