The United States of America (USA nobe USA), sivame ukubizwa ngokuthi i-United States (US nobe US), eMelika, kanti ngezinye izikhathi-United, kuyinto republic federal ehlanganisa 50 uthi futhi esifundeni sikahulumeni. Lithi contiguous 48 naseWashington, DC, kukhona enkabeni Nyakatfo Melika ephakathi Canada ne Mexico. Isimo Alaska kuyinto ingxenye ntshonalanga yeNyakatho Melika kanye isimo eHawaii kuyisici leziqhingi maphakathi nawo-Pacific. Yezwe unabo ezinhlanu enabantu nesishiyagalolunye amasimu unpopulated ePacific kanye eCaribbean. Ka million 3,71 amakhilomitha-skwele (million 9,62 km2) kanye nabantu abayi 318 million abantu, i-United States 3 emhlabeni noma 4th ngobukhulu izwe by endaweni inani nowesithathu ngobukhulu by labantu. Ingenye kunazo Abase izizwe zezwe ezihlukahlukene amaningi, umkhiqizo ezinkulu kwamanye amazwe ezivela emazweni amaningi. I geography kanye sezulu-United States futhi ezihlukahlukene kakhulu, futhi kuba kumuntu ezihlukahlukene zasendle ekhaya .
Paleo-amaNdiya bafudukela kusukela Eurasia kulokho manje ezwenikazi US azungeze 15,000 edlule, nge ikoloni European Kusukela ngekhulu le-16. The United States saphuma 13 amakoloni waseBrithani akhiwe egudle seaboard Atlantic. Izimpikiswano emkhatsini Great Britain nalaba amakoloni kwaholela American Revolution. Ngo 4 July 1776, njengoba amakoloni elwa Great Britain in the American Revolutionary War, izihambeli ezivela amakoloni 13 eyakhishwa ngazwilinye Declaration of Independence. Impi yaphela ngo 1783 kanye nokubhekelelwa uzibuse-United States kusukela Kingdom of Great Britain, futhi kwaba impi yokuqala ngempumelelo uzibuse elithweswe umbuso zamakoloni European. UMthethosisekelo yamanje elamukelwa ngo 17 September 1787. Eyokuqala izichibiyelo eziyishumi, bebonke okuthiwa i Bill of Rights, base izibophezele ngo 1791 uqiniseke abaningi amalungelo yombango lasisekelo kanye nenkululeko.
Beqhutshwa imfundiso zibonakale ikusasa, United States baqala ukwanda eyingqabavu yonkana Nyakatfo Melika kulo lonke ikhulu le-19. Lokhu ababehilelekile displacing zakwa bomdabu, nizuza amasimu amasha, futhi kancane kancane ukuvuma uthi ezintsha. The American War Civil yaphela kobugqila zomthetho kuleli lizwe. Ekupheleni kwekhulu le-19, i-United States enwetshiwe ePacific Ocean, kanye nomnotho walo kwaba emhlabeni ngobukhulu. AbaseSpain-American War kanye neMpi Yezwe I ukuqinisekisile isimo wezwe njengoba amandla global ezempi. The United States saphuma iMpi Yezwe II njengendlela ukubangisana kwemibuso emikhulu global, lizwe lokuqala ngezikhali zenuzi, futhi ilungu unomphela United Nations Security Council. Ekupheleni kweMpi Yomshoshaphansi kanye kuqedwa Union washiya United States njengoba ukubangisana kwemibuso emikhulu yedwa.
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