Granted the U.S. transit rights and military authority over the Panamanian isthmus, shaping U.S. involvement in the region through 1903.
Key Facts
- Date signed
- December 12, 1846
- U.S. negotiator
- Benjamin Alden Bidlack
- New Granada negotiator
- Manuel María Mallarino
- Official title
- Treaty of Peace, Friendship, Commerce and Navigation
- Panama Railway construction
- 7 years following California Gold Rush (1848)
- U.S. military interventions
- Multiple interventions on the isthmus under treaty authority
Location
Cause → Event → Consequence
The United States sought guaranteed transit rights across the Panamanian isthmus to facilitate westward expansion and commerce, while New Granada desired a stable relationship with a major power to help maintain sovereignty over its territory amid internal political tensions and independence movements.
On December 12, 1846, U.S. minister Benjamin Alden Bidlack and New Granada commissioner Manuel María Mallarino signed a bilateral treaty in Bogotá. The agreement formally established peace, friendship, and commerce between the two nations, and crucially granted the U.S. transit rights across the isthmus of Panama along with authority to intervene militarily to suppress conflicts threatening Colombian control.
The treaty provided the legal basis for repeated U.S. military interventions on the isthmus, typically directed against civilians, guerrillas, or Liberal independence movements. It facilitated construction of the Panama Railway following the 1848 Gold Rush and ultimately gave the United States the political and economic foothold that contributed to Panamanian independence from Colombia in 1903.
Political Outcome
Treaty ratified, granting the U.S. transit rights over the Panamanian isthmus and authority to conduct military interventions to maintain Colombian sovereignty there.
New Granada held nominal sovereignty over Panama with limited foreign involvement
The U.S. gained legal transit rights and military intervention authority over the Panamanian isthmus