Conflicts 1826 – 1850

Source: https://iamyouasheisme.files.wordpress.com/2009/03/guard1848.jpg

This list comes from Wikipedia. I’ve chosen to use this list because I think Wikipedia provides a reliable set of data which I’m not able to collect myself. If you have any comments, additions or adjustments, please feel free to contact me.
All links direct to Wikipedia pages for background information.

1826	1828	Russo-Persian War (1826–28)	Russian Empire	Persian Empire
		Part of the Russo-Persian Wars
1826	1828	Siamese-Lao War	Siam	Anouvong
				King of Vientiane
1827	1827	Winnebago War	United States	Winnebago
			Local militia
1828	1829	Gran Colombia–Peru War	Gran Colombia	Peru
1828	1828	Irish and German Mercenary Soldiers’ Revolt	Empire of Brazil	Irish and German merceneries
1828	1834	Liberal Wars	Liberal forces of King Pedro IV	Absolutist forces of King Miguel
			United Kingdom
			Spain
1828	1829	Russo-Turkish War (1828–29)	Russian Empire	Ottoman Empire
1828	1832	Black War	British Empire	Tasmanian Aborigines
1829	1830	Chilean Civil War of 1829–30	Pelucones	Pipiolos
			Military of Chile
			Chilean Army
			Chilean Navy
1830	1830	July Revolution	House of Orléans	House of Bourbon
		French Revolution of 1830
1830	1831	November Uprising	Russian Empire	Polish insurgents
1830	1831	Belgian Revolution	Southern Provinces of the Netherlands	United Kingdom of the Netherlands
1830	1847	French conquest of Algeria	France	Algerian and Ottoman resistance
1830	1850	Port Phillip District Wars	British Empire	Australian Aborigines
1831	1834	Siamese–Vietnamese War (1831–34)	Viet Nam	Siam
			Viet Nam protectorate of Cambodia
1831	1832	Baptist War	Jamaican military	Rebel slaves
			White settlers
1831	1833	Egyptian–Ottoman War (1831–33)	Egypt	Ottoman Empire
				Russian Empire (from 1833)
1831	1833	Yagan Resistance	British Empire	Yagan
1832	1832	Black Hawk War	United States	Black Hawk’s British Band:
			Ho-Chunk	Sauk
			Menominee	Fox
			Potawatomi	Kickapoo
1833	1835	Lê Văn Khôi revolt	Nguyễn Dynasty	Lê Văn Khôi rebels
1833	1839	Albanian Revolts of 1833–39	Ottoman Empire	Albanian rebels
1833	1840	First Carlist War	Liberals and Allies:	Carlists:
			Forces of Queen Isabella II of Spain	Forces of Infante Carlos of Spain
			United Kingdom	Forces of King Miguel of Portugal
			Kingdom of the French
			Forces of King Pedro IV of Portugal
1834	1834	Peasants’ Revolt of 1834 (Palestine)	Egypt Eyalet	Palestinian Peasants
1834	1834	Battle of Pinjarra	British Empire	Pinjarup
1834	1836	Sixth Xhosa War	British Empire	Xhosa Tribes
			Free Khoikhoi
1835	1835	Malê Revolt	Empire of Brazil	Rebel slaves
1835	1836	Texas Revolution	Republic of Texas	Mexico
1835	1842	Second Seminole War	United States	Seminole Tribes
		Part of the Seminole Wars
1835	1845	Ragamuffin War	Empire of Brazil	Riograndense Republic
				Juliana Republic
1835	1840	Cabanagem	Empire of Brazil	Indians
				Cabanos
1836	1839	War of the Confederation	Chile	Peru-Bolivian Confederation
			North Peru
			Argentina
1837	1838	Lower Canada Rebellion	United Kingdom	Patriote movement
		Part of the Rebellions of 1837
			British North America	American Volunteers
1837	1838	Upper Canada Rebellion	United Kingdom	Hunters’ Lodges
		Part of the Rebellions of 1837
			British North America	Republic of Canada
1838	1838	Battle of Blood River	Voortrekkers	Zulu kingdom
1838	1838	Mormon War	Non-Mormon Missourians	Latter Day Saint movement
1838	1839	Balaiada	Empire of Brazil	Balaios
				African slaves
1838	1839	Pastry War	Kingdom of the French	Mexico
1839	1847	Albanian Revolt of 1847	Ottoman Empire	Albanian rebels
1839	1841	War of the Supremes
1839	1842	First Anglo-Afghan War	Emirate of Afghanistan	British Empire
				British East India Company
1839	1842	First Opium War	British Empire	Qing Empire of China
1839	1851	Uruguayan Civil War	Colorados	Blancos
			Argentine Unitarians	Argentine Confederation
			Kingdom of the French
			Riograndense Republic
			British Empire
			Empire of Brazil
			Italian Legion
1840s	1860s	Eumerella Wars	British Empire	Gunditjmara people
1841	1841	Niš Rebellion (1841)	Ottoman Empire	Christian rebels
1841	1845	Siamese–Vietnamese War (1841–45)	Viet Nam	Siam
			Viet Nam protectorate of Cambodia	Cambodian forces loyal to King Ang Duong
1841	1842	Sino-Sikh War	Qing Empire	Sikh Empire
1843	1844	Albanian Revolt of 1843–44	Ottoman Empire	Albanian rebels
1843	1843	Wairau Affray	Ngati Toa Iwi	British Settlers
		Part of the New Zealand land wars
1843	1843	Battle of One Tree Hill	British Settlers	Jagera people
1843	1849	Dominican War of Independence	Dominican Republic	Haiti
1844	1844	Franco-Moroccan War	France	Morocco
1845	1845	Albanian Revolt of 1845	Ottoman Empire	Albanian rebels
1845	1846	First Anglo-Sikh War	British East India Company	Sikh Empire
1845	1846	Flagstaff War	Ngapuhi Iwi	British Empire
		Northern War
		Part of the New Zealand land wars		Forces of Tamati Waka Nene
1846	1846	Hutt Valley Campaign	British Empire	Ngati Toa Iwi
		Part of the New Zealand land wars
			British Settlers
			Te Ati Awa Iwi
1846	1846	Galician slaughter	Austrian Empire	Polish peasants
1846	1846	Dutch intervention in Northern Bali (1846)	Netherlands	Bali
1846	1847	Seventh Xhosa War	British Empire	Xhosa Tribes
1846	1849	Second Carlist War	Forces of Queen Isabella II of Spain	Carlists
		War of the Madrugadores
1846	1848	Mexican–American War	United States	Mexico
1846	1848	Wanganui Campaign	British Empire	Maori Iwis
		Part of the New Zealand land wars
			British Settlers
			Maori Kupapa
1847	1901 (Chan Santa Cruz occupied)	Caste War of Yucatán	Mexico	Maya Free State
	1933 (Last of skirmishes)
1847	1847	Sonderbund War	Swiss Confederation	Sonderbund
1847	1855	Cayuse War	United States	Cayuse
1848	1849	Praieira revolt	Empire of Brazil	Praieiros
1848	1848	Revolutions of 1848 in the Italian states	Austrian Empire	Kingdom of Sicily
			Kingdom of Two Sicilies	Provisional Government of Milan
			Papal States	Republic of San Marco
				Roman Republic
				Central Italy Rebels
				Supported by:
				Kingdom of Sardinia
1848	1848	Greater Poland Uprising (1848)	Kingdom of Prussia	Polish rebels
1848	1848	French Revolution of 1848	Second French Republic	July Monarchy
1848	1848	Revolutions of 1848 in the German states	German Confederation	German Rebels
			Austrian Empire
			Baden
			Prussia
			Kingdom of Saxony
			Bavaria
			Rhenish Palatinate
1848	1849	Revolutions of 1848 in the Habsburg areas
1848	1848	Wallachian Revolution of 1848	Ottoman Empire	Wallachia
			Russian Empire
1848	1848	Sicilian revolution of independence of 1848	Kingdom of the Two Sicilies	Kingdom of Sicily
			Supported by:	Supported by:
			Kingdom of Spain	Congress Poland
1848	1848	Dutch intervention in Northern Bali (1848)	Netherlands	Bali
1848	1849	First Italian War of Independence	Austrian Empire	Kingdom of Sardinia
				Grand Duchy of Tuscany
				Papal States
				Kingdom of the Two Sicilies
1848	1849	Second Anglo-Sikh War	British Empire	Sikh Empire
			British East India Company
1848	1849	Hungarian War of Independence	Austrian Empire	Hungary
			Russian Empire
1848	1849	Praieira revolt	Empire of Brazil	Praieiros
1848	1851	First Schleswig War	Denmark	Schleswig-Holstein
		The Three Years’ War
				Prussia
				Kingdom of Saxony
1849	1850	Dutch intervention in Bali (1849)	Netherlands	Buleleng
			Lombok	Jembrana
				Klungkung
1849	1855	Burmese–Siamese War (1849–55)	Burma	Siam
1849	1924	Apache Wars	United States	Apacheria:
			(1849–1924)
			Confederate States	Chiricahua Apache
			(1861–1865)	Jicarilla Apache
				Mescalero Apache
				Lipan Apache
				Western Apache
				Plains Apache
				Apache Allies:
				Ute
				Yavapai
				Comanche
				Cheyenne
				Kiowa
				Yuma
				Mohave
1851	1851	1851 Chilean Revolution	Chile	Liberal rebels
1850	1864	Taiping Rebellion	Qing Empire of China	Taiping Heavenly Kingdom
			British Empire
			French Empire
1850	1853	Eighth Xhosa War	British Empire	Xhosa Tribes
				Khoikhoi Tribes
				Native Kafir Police