California annexation by the United States

E607216

19th-century event historical event territorial annexation

California annexation by the United States was the mid-19th-century process, culminating in the Mexican–American War and the 1848 Treaty of Guadalupe Hidalgo, by which the U.S. took control of Mexican Alta California and incorporated it into its territory.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (6)

Label	Occurrences
American annexation of California	2
U.S. military occupation of California	2
California annexation by the United States canonical	1
U.S. annexation of California	1
U.S. occupation of California	1
United States military occupation of California	1

How this entity was disambiguated

This entity first appeared as the object of triple T6598900 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: California annexation by the United States
Context triple: [Sonoma Barracks, associatedWith, California annexation by the United States]

A. United States territorial expansion
United States territorial expansion refers to the historical process by which the United States grew from a cluster of Atlantic coast colonies into a transcontinental nation through purchases, wars, treaties, and settlement.
B. Annexation of Hawaii by the United States in 1898
The Annexation of Hawaii by the United States in 1898 was the formal incorporation of the Hawaiian Islands into U.S. territory, ending the sovereignty of the Hawaiian Kingdom and paving the way for Hawaii’s eventual statehood.
C. Annexation of Texas
The Annexation of Texas was the 1845 incorporation of the Republic of Texas into the United States, a pivotal expansionist move that heightened sectional tensions over slavery in the antebellum era.
D. Alaska Purchase
The Alaska Purchase was the 1867 transaction in which the United States bought the Alaska territory from the Russian Empire, significantly expanding U.S. land holdings in North America.
E. Louisiana Purchase
The Louisiana Purchase was an 1803 land deal in which the United States bought a vast territory from France, doubling the nation's size and securing control of the Mississippi River region.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: California annexation by the United States
Target entity description: California annexation by the United States was the mid-19th-century process, culminating in the Mexican–American War and the 1848 Treaty of Guadalupe Hidalgo, by which the U.S. took control of Mexican Alta California and incorporated it into its territory.

A. United States territorial expansion
United States territorial expansion refers to the historical process by which the United States grew from a cluster of Atlantic coast colonies into a transcontinental nation through purchases, wars, treaties, and settlement.
B. Annexation of Hawaii by the United States in 1898
The Annexation of Hawaii by the United States in 1898 was the formal incorporation of the Hawaiian Islands into U.S. territory, ending the sovereignty of the Hawaiian Kingdom and paving the way for Hawaii’s eventual statehood.
C. Annexation of Texas
The Annexation of Texas was the 1845 incorporation of the Republic of Texas into the United States, a pivotal expansionist move that heightened sectional tensions over slavery in the antebellum era.
D. Alaska Purchase
The Alaska Purchase was the 1867 transaction in which the United States bought the Alaska territory from the Russian Empire, significantly expanding U.S. land holdings in North America.
E. Louisiana Purchase
The Louisiana Purchase was an 1803 land deal in which the United States bought a vast territory from France, doubling the nation's size and securing control of the Mississippi River region.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	19th-century event ⓘ historical event ⓘ territorial annexation ⓘ
affectedPopulation	Californios ⓘ Indigenous peoples of California ⓘ
cause	Manifest Destiny ideology ⓘ linked to: United States territorial expansion Mexican–American War ⓘ U.S. expansionist policy ⓘ
concludedBy	Treaty of Guadalupe Hidalgo ⓘ
conflict	Mexican–American War ⓘ
countryInvolved	Mexico ⓘ United States ⓘ linked to: United States of America
dateOfTreaty	1848-02-02 ⓘ
endTime	1848 ⓘ
followedBy	California Gold Rush ⓘ California statehood ⓘ Compromise of 1850 ⓘ
hasEffect	end of Mexican sovereignty over Alta California ⓘ incorporation of California into U.S. territory ⓘ transfer of Alta California from Mexico to the United States ⓘ
includesTerritory	parts of present-day Nevada ⓘ parts of present-day Utah ⓘ present-day U.S. state of California ⓘ small parts of present-day Arizona ⓘ
legalBasis	Treaty of Guadalupe Hidalgo ⓘ
locatedIn	Alta California ⓘ linked to: Mexican Alta California Pacific Coast of North America ⓘ linked to: Pacific coast of North America
militaryCommanderInvolved	John C. Frémont ⓘ John D. Sloat ⓘ Robert F. Stockton ⓘ Stephen W. Kearny ⓘ
opposedBy	Mexican government ⓘ linked to: Government of Mexico
partOf	Manifest Destiny era ⓘ linked to: United States territorial expansion westward expansion of the United States ⓘ
precededBy	Mexican governance of Alta California ⓘ
relatedTo	Mexican Cession ⓘ linked to: Treaty of Guadalupe Hidalgo Oregon boundary dispute ⓘ Texas annexation by the United States ⓘ
resultedIn	U.S. control of Pacific coastline from Oregon to Baja California border ⓘ granting of U.S. citizenship to many former Mexican residents of California ⓘ recognition of new U.S.–Mexico boundary ⓘ
significantEvent	Bear Flag Revolt ⓘ Mexican–American War ⓘ Treaty of Guadalupe Hidalgo ⓘ U.S. military occupation of California ⓘ linked to: California annexation by the United States
startTime	1846 ⓘ
territoryTransferredFrom	Mexico ⓘ
territoryTransferredTo	United States ⓘ linked to: United States of America
timePeriod	mid-19th century ⓘ

How these facts were elicited