Diplomat
United States and New Granada sign treaty guaranteeing transit across the isthmus
Permanent historical records · Updated 2026-11-03
1846 in United States of America — Page 2
Explore 108 historical events and records for United States of America in 1846.
Historical records for United States of America in 1846
Sorted by month and day. Records with no month are shown last. Showing 40 of 108 unique records.
108Unique records
2 of 3Page
38Named events on this page
12Named people on this page
18Places on this page
December
Free Transit Clause
Treaty grants free transit over existing or future routes across the Isthmus of Panama
Future Communications Route
Treaty language covers routes that may later be constructed across Panama
Interoceanic Route
Polk administration treats the Panama route as a strategic interoceanic connection
Isthmian Transit Rights
United States obtains rights of transit across the Isthmus of Panama
Mallarino Bidlack Treaty
Polk administration secures treaty framework for United States transit across the Isthmus of Panama
Military Protection Clause
Treaty is later interpreted as permitting United States protection of isthmian transit
Neutrality Guarantee
United States agrees to guarantee the neutrality of the isthmian transit route
New Granada Sovereignty
United States recognizes and guarantees New Granadan sovereignty over the Isthmus of Panama
New Granada Treaty Rights
Treaty creates reciprocal rights and obligations between the United States and New Granada over Panama transit
Pacific Access
Treaty strengthens United States access between Atlantic and Pacific routes
Panama Canal
Mallarino Bidlack Treaty creates an early legal basis for future American canal policy in Panama
Panama Railroad Precedent
Treaty helps prepare the legal environment for later United States-backed railroad transit across Panama
Panama Transit Guarantee
United States guarantee becomes a key legal background to later Panama Canal diplomacy
Route Neutrality
United States guarantee of neutrality makes Panama transit a matter of American foreign policy
Strategic Transit Policy
Polk administration advances a strategic policy of protected isthmian communication
Transit Route Protection
Treaty gives the United States a diplomatic interest in protecting transit across Panama
Other events (month unknown)
Rio Grande Dispute
Orders General Zachary Taylor to move troops toward the Rio Grande in the disputed border region
Oregon Joint Occupation Notice
Polk directs formal notice ending joint occupation arrangements for Oregon
Thornton Affair
Mexican forces clash with a United States patrol north of the Rio Grande
Declaration of War
Polk signs proclamation announcing that a state of war exists with Mexico
Oregon Treaty
Oregon Treaty establishes the 49th Parallel boundary between British and American claims in the Pacific Northwest
Walker Tariff
Polk signs the Walker Tariff lowering tariff rates and reshaping federal revenue policy
Capture of Santa Fe
United States forces under Stephen W. Kearny occupy Santa Fe without major resistance
Battle of Monterrey
United States forces begin the Battle of Monterrey in northern Mexico
Capture of Monterrey
Mexican forces surrender Monterrey to the United States after several days of fighting
Battle of El Brazito
United States forces defeat Mexican forces during the New Mexico campaign
American Fleet Occupies Tampico
American naval forces occupied Tampico in November as the Gulf blockade tightened around Mexican ports.
Army Of West Marches Southwest
Stephen Kearny led the Army of the West across the plains toward New Mexico and then California.
Blockade of the Rio Grande
Forms a marine battalion which blockades the Rio Grande
Blockade of the Rio Grande
Edson forms a marine battalion to support blockade operations near the Rio Grande
Buchanan Signs Oregon Agreement
Secretary of State James Buchanan signed the Oregon Treaty on behalf of the United States.
Doniphan Advances Into Northern Mexico
Alexander Doniphan led Missouri volunteers on an extended campaign from New Mexico toward Chihuahua.
Doniphan Wins El Brazito Fight
Doniphan's volunteer force defeated Mexican troops at El Brazito in December during its march south.
Election
Elected to the US House of Representatives
Federal Depositaries Reestablished By Statute
The 1846 act designated public officers and locations for custody of federal revenue instead of depositing it in private banks.
Fremont Cooperates With Pacific Fleet
John Fremont worked with American naval officers and local supporters during the contest for California.
Henderson Takes Office As Governor
James Pinckney Henderson took office as the first governor of the State of Texas after the formal transfer of government.
Invasion of Mexico
Mounts an invasion of Mexico from Tampico
Invasion of Mexico
Scott prepares an invasion of Mexico from the Gulf coast after the northern campaign stalls
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.