what event led to establishing the department of homeland security answers.com
United States Department of Homeland Security The United States Department of Homeland Security (DHS) is a cabinet department of the United States federal government with responsibilities in public security, roughly comparable to the interior or home ministries of other countries. Its stated missions involve anti-terrorism, border security, immigration and customs, cyber security, and disaster prevention and management.[3] It was created in response to the September 11 attacks and is the youngest U.S. cabinet department.
United States Paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago.[23] European colonization began in the 16th century. The United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the colonies following the Seven Years' War led to the American Revolution, which began in 1775, and the subsequent Declaration of Independence in 1776. The war ended in 1783 with the United States becoming the first country to gain independence from a European power.[24] The current constitution was adopted in 1788, with the first ten amendments, collectively named the Bill of Rights, being ratified in 1791 to guarantee many fundamental civil liberties. The United States embarked on a vigorous expansion across North America throughout the 19th century, acquiring new territories,[25] displacing Native American tribes, and gradually admitting new states until it spanned the continent by 1848.[25] During the second half of the 19th century, the American Civil War led to the end of legal slavery in the country.[26][27] By the end of that century, the United States extended into the Pacific Ocean,[28] and its economy, driven in large part by the Industrial Revolution, began to soar.[29] The Spanish–American War and World War I confirmed the country's status as a global military power. The United States emerged from World War II as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, and a permanent member of the United Nations Security Council. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the world's sole superpower.[30]
Manifest destiny Historian Frederick Merk says this concept was born out of "a sense of mission to redeem the Old World by high example ... generated by the potentialities of a new earth for building a new heaven".[4]
American Revolution Support for the conflict had never been strong in Britain, where many sympathized with the Americans, but now it reached a new low.[72] King George III personally wanted to fight on, but his supporters lost control of Parliament and no further major land offensives were launched in the American Theater.[65][73]