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c. 9500 BC – Cordilleran and Laurentide Ice Sheets retreat enough to open a habitable ice-free corridor through the northern half of the continent (North America) along the eastern flank of the Rocky Mountains. c. 1000 BCE-1000 CE – Woodland Period of Pre-Columbian Native Americans in Eastern America.
The 14th century in America probably also brought decline of the Mississippian culture, especially in the northern states. Dendroclimatology suggests that severe droughts ravaged the American Southwest and especially the Southern Plains early in the period, leading to a rapid cultural decline.
Map of early human migrations based on the Out of Africa theory; figures are in thousands of years ago (kya). [1]The peopling of the Americas began when Paleolithic hunter-gatherers (Paleo-Indians) entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the ...
The following table is a list of all 50 states and their respective dates of statehood. The first 13 became states in July 1776 upon agreeing to the United States Declaration of Independence, and each joined the first Union of states between 1777 and 1781, upon ratifying the Articles of Confederation, its first constitution. [6]
Timeline of pre–United States history; Timeline of the history of the United States (1760–1789) Timeline of the history of the United States (1790–1819) Timeline of the history of the United States (1820–1859) Timeline of the history of the United States (1860–1899) Timeline of the history of the United States (1900–1929)
April: American ports opened to all nations. May: Continental Congress authorizes the drafting of new state constitutions. July 4: Adoption of the United States Declaration of Independence. 1776–81 – American Revolution. 1783 – September: Britain signs the Treaty of Paris, recognizing American independence. [3]
The American Nation: A History of the United States: AP Edition (2008) Egerton, Douglas R. et al. The Atlantic World: A History, 1400–1888 (2007), college textbook; 530pp; Elliott, John H. Empires of the Atlantic World: Britain and Spain in America 1492–1830 (2007), 608pp excerpt and text search, advanced synthesis
Pre-Columbian America. ... United States, ... List of timelines around the world. Logarithmic timeline shows all history on one page in ten lines.