word | | Independence |
| Commonwealth | Poland | 11 November 1918 (republic proclaimed); notable earlier dates: A.D. 966 (adoption of Christianity, traditional founding date), 1 July 1569 (Polish-Lithuanian Commonwealth created) |
| commonwealth | Puerto Rico | none (territory of the US with commonwealth status) |
| Community | European Union | ... force) note: Treaties of Rome, which were signed on 25 March 1957 and entered into force on 1 January 1958, created the European Economic Community and the European Atomic ... |
| complete | Bulgaria | 3 March 1878 (as an autonomous principality within the Ottoman Empire); 22 September 1908 (complete independence from the Ottoman Empire) |
| complete | Senegal | 4 April 1960 (from France); note - complete independence achieved upon dissolution of federation with Mali on 20 August 1960 |
| completed | Bosnia and Herzegovina | 1 March 1992 (from Yugoslavia; referendum for independence completed on 1 March 1992; independence declared on 3 March 1992) |
| completed | Spain | ... the north began the reconquest almost immediately, culminating in the seizure of Granada in 1492; this event completed the unification of several kingdoms and is traditionally considered the forging of present-day |
| conclude | Netherlands | 23 January 1579 (the northern provinces of the Low Countries conclude the Union of Utrecht breaking with Spain; on 26 July 1581 they formally declared their independence with an Act of Abjuration ... |
| Confederation | Switzerland | 1 August 1291 (founding of the Swiss Confederation) |
| consider | Czech Republic | ... and Slovakia); note - although 1 January is the day the Czech Republic came into being, the Czechs generally consider 28 October 1918, the day the former Czechoslovakia declared its independence from the ... |
| considerably | Holy See (Vatican City) | ... acknowledged, among other things, the full sovereignty of the Vatican and established its territorial extent; however, the origin of the Papal States, which over centuries varied considerably in extent, may be traced |