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The history of post-confederation Canada began on July 1, 1867, when theBritish North American colonies ofCanada,New Brunswick, andNova Scotia wereunited to form a singleDominion within theBritish Empire.[1] Upon Confederation, theProvince of Canada was immediately split into the provinces ofOntario andQuebec.[2] In 1870, Canada acquired the vast expanse of the continent controlled by theHudson's Bay Company, which was eventually divided into new territories and provinces.British Columbia joined in 1871, andPrince Edward Island in 1873.[3] Canada evolved into a fully sovereign state by1982.[4]
Before being part of British North America, the constituents of Canada consisted of theformer colonies ofCanada andAcadia from withinNew France which had been ceded toGreat Britain in 1763 as part of theTreaty of Paris.[5]French Canadian nationality was maintained as one of the "two founding nations" and legally through theQuebec Act which ensured the maintenance of theCanadian French language, Catholic religion, and French civil law within Canada, a fact which remains true today.[6]
Canada today hasten provinces and three territories; it only lost significant territory in the border dispute overLabrador with theDominion of Newfoundland, which later joined Canada as the 10th province.[7]
| Date | Event | Change |
|---|---|---|
| July 1, 1867 | The Dominion of Canada wasformed by the United Kingdomfrom three provinces ofBritish North America:[8][a]
The capital was established atOttawa. Canada inherited territorial disputes with the United States overMachias Seal Island andNorth Rock, which remain disputed up to the present.[14] | Disputes: |
| July 15, 1870 | The United Kingdom transferred most of its remaining land in North America to Canada, with theNorth-Western Territory andRupert's Land becoming theNorth-West Territories.[e] The British government made the transfer after Canada and the Hudson's Bay Company agreed to the terms, including a payment of £300,000 from Canada to the Company.[18] Due to a vague description and lack of quality surveying, part of the western border with the United States wasunclear and disputed.[16] Canada disagreed with the United Kingdom over the extent ofLabrador that remained withNewfoundland Colony, citing the historical use of the term "Coasts of Labrador." A rectangular area of the newly acquired region around the city ofWinnipeg wasmade the province ofManitoba.[f][19] | Disputes: |
| July 20, 1871 | The Britishcolony ofBritish Columbia joined Canada as the sixth province.[20][g] The province brought along itsdispute with the United States over theSan Juan Islands,[22] as well as its portion of theAlaska boundary dispute.[16] | Disputes: |
| October 21, 1872 | Thedispute with the United States over theSan Juan Islands was resolved in favour of the United States claim.[22] | Disputes: |
| July 1, 1873 | The British colony ofPrince Edward Island joined Canada as the seventh province.[23] | |
| June 26, 1874 | The borders ofOntario were provisionally expanded north and west. When theProvince of Canada was formed, its borders were not entirely clear, and Ontario claimed to eventually reach all the way to theRocky Mountains andArctic Ocean. With Canada's acquisition ofRupert's Land, Ontario was interested in clearly defining its borders, especially since some of the new areas it was interested in were rapidly growing. After the federal government asked Ontario to pay for construction in the new disputed area, the province asked for an elaboration on its limits, and its boundary was moved north to51° north, and west to a line running north fromHunter's Island.[24] | |
| October 7, 1876 | TheDistrict of Keewatin was created from a central strip of theNorth-West Territories to provide government for the growing area north ofManitoba and west ofOntario; while the North-West Territories consisted of severaldistricts, Keewatin had an elevated status and many sources note it distinct from the rest of the North-West Territories.[h][25] | |
| September 1, 1880 | The United Kingdom transferred itsArctic Islands to Canada, where they were made part of theNorth-West Territories.[26] Thearchipelago was still being explored and new islands discovered, but the United Kingdom and Canada had claimed the whole archipelago, so new discoveries are not noted unless disputed. | |
| December 23, 1881 | Manitoba was expanded, gaining land from theDistrict of Keewatin andNorth-West Territories to the west, north, and east.[i] Since the province's new eastern border was defined as the "western boundary ofOntario", the exact definition of which was still unclear, Ontario disputed a portion of the new region.[28][27] | |
| May 7, 1886 | The southwestern border of theDistrict of Keewatin was adjusted to conform to the boundaries of theprovisional districts of the North-West Territories.[j][29] | |
| August 12, 1889 | The dispute betweenManitoba andOntario ended as Ontario's borders were finalized, extending the province west to theLake of the Woods and north to theAlbany River.[30] | |
| October 2, 1895 | TheDistrict of Keewatin was expanded to the portion of theNorth-West Territories north of Ontario.[31] | |
| December 18, 1897 | Southampton Island,Coats Island,Akimiski Island, and other islands were transferred from theNorth-West Territories to theDistrict of Keewatin, andBoothia Peninsula andMelville Peninsula were transferred from the District of Keewatin to the North-West Territories.[32] | |
| June 13, 1898 | Yukon Territory was created from theDistrict of Yukon in the northwestern part of theNorth-West Territories to supply a more local government to the explosive growth in population due to theKlondike Gold Rush.[k][33][34]Quebec wasenlarged north.[35][l] | |
| May 23, 1901 | The eastern border ofYukon Territory was slightly adjusted, thus exchanging some area with theNorth-West Territories, and also including some more islands.[36] | |
| October 20, 1903 | TheAlaska boundary dispute was resolved, generally in favour of the United States claim.[16] | Disputes: |
| September 1, 1905 | The provinces ofAlberta (act) andSaskatchewan (act) were created from theNorth-West Territories. The provinces consisted of the area betweenBritish Columbia,Manitoba, the60th parallel north, and the United States, with Alberta west of the 4th meridian of theDominion Land Survey and Saskatchewan east of it. The status of theDistrict of Keewatin was lowered back to the other districts of the North-West Territories.[37][38][39][40][41] | |
| 1906 | TheNorth-West Territories were renamed the Northwest Territories.[42][43] | |
| September 26, 1907 | TheNewfoundland Colony became adominion of the United Kingdom, inheriting theLabrador boundary dispute. | Disputes: |
| April 11, 1908 | A boundary treaty redefined the maritime border with the United States.[44] Among other changes, this "de-enclaved" Horseshoe Reef inLake Erie by making the water around it contiguous with the water on the American side of the border.[45][46] | no change to map |
| August 20, 1910 | A boundary treaty with the United States addressed a slight uncertainty in the maritime border inPassamaquoddy Bay betweenNew Brunswick and the United States.[47][48] The border was adjusted to run east of Pope's Folly Island, which previously lay on the border line, and had been the subject of some debate for many years.[49][50] | |
| May 15, 1912 | Manitoba,Ontario, andQuebec (act) were all expanded northward into land from theNorthwest Territories.[42] Quebec was expanded north to fill the mainland, Manitoba extended north to the60th parallel north, and the new border between Manitoba and Ontario ran northeast from the previous northeastern corner of Manitoba.[51][52] | |
| June 1, 1925 | The maritime boundaries of theNorthwest Territories were extended to theNorth Pole.[42] | no change to map |
| July 17, 1925 | The border with the United States was adjusted in several places.[53][54] The only change to a land border redefined how the border between theLake of the Woods and theRocky Mountains should be considered; previously, the border followed the curve of the parallel between each border monument, while the treaty changed this to straight lines between each monument. Through this, the United States netted a gain of between 30 and 35 acres (0.12–0.14 km2) of land. There was also a change to the border in theLake of the Woods; due to inaccurate surveying, the previous border intersected itself several times in the lake, creating enclaves of United States water surrounded by Canadian water. The treaty changed the border to use the southernmost intersection as thenorthwestern point of the Lake of the Woods. Finally, the maritime border in theBay of Fundy was adjusted, netting Canada roughly 9 acres (0.036 km2) of water. | too small to map |
| March 11, 1927 | TheJudicial Committee of the British Privy Council decided theLabrador boundary dispute with theDominion of Newfoundland in favour of Newfoundland.[55][m]Quebec has occasionally indicated it does not recognize this border, but has not actively disputed the matter.[55] | Disputes: |
| November 11, 1930 | Norway ceded its long-dormant claim to theSverdrup Islands to Canada, in exchange for British recognition of Norway's sovereignty overJan Mayen. | Disputes: |
| December 11, 1931 | TheStatute of Westminster 1931 confirmed Canada's sovereignty from the United Kingdom on legislative and foreign issues. | no change to map |
| March 31, 1949 | TheDominion of Newfoundlandjoined as the tenth province,Newfoundland.[56][57] | |
| March 13, 1974 | The maritime border with Denmark was defined, notably "skipping"Hans Island which lies directly betweenEllesmere Island andGreenland, and which was technically on neither side of the border.[58] | no change to map |
| March 1, 1977 | The United Statesclaimed maritime borders west of theStrait of Juan de Fuca, within theDixon Entrance, and in theBeaufort Sea that conflicted with claims of Canada.[59] | |
| April 17, 1982 | TheConstitution Act, 1982, via theCanada Act 1982, made Canada completely independent of the United Kingdom, removing the requirement to involve the British parliament in amending theCanadian constitution. | |
| October 12, 1984 | TheInternational Court of Justice decided the maritime border with the United States in theGulf of Maine.[60] No land changed hands, and the scope of the case did not include the sovereignty ofMachias Seal Island.[59] | |
| April 1, 1999 | The territory ofNunavut was created from roughly the eastern half of theNorthwest Territories.[n][61] | |
| December 6, 2001 | The province of Newfoundland was renamedNewfoundland and Labrador.[62] | |
| April 1, 2003 | Yukon Territory was renamedYukon, though it remained a territory.[63] | |
| December 19, 2023 | The border with Denmark was defined so that it passes throughHans Island rather than skipping over it.[64] The agreement was announced on June 14, 2022, and the Danish parliament passed it on December 19, 2023.[65] |
The District of Franklin (situated inside of the grey border on the map herewith) comprising Melville and Boothia Peninsulas, ...