HistoryData
Historical ConflictFort St. Philip

Siege of Fort St. Philip

A ten-day Royal Navy bombardment of Fort St. Philip in January 1815 ended when American counter-fire forced the British to withdraw, securing the lower Mississippi River.

Duration & Scope

1815 ongoing

< 1 year

Key Facts

Duration
10 days
British vessels
2 Royal Navy bomb vessels
Mortars deployed
4 (British side)
American counter-attack date
January 17, 1815
Conflict context
Concluding hostilities of the War of 1812

Strategic Narrative Overview

Two Royal Navy bomb vessels positioned themselves beyond the range of the fort's solid-shot cannon and opened a long-distance mortar bombardment lasting ten days. The American garrison was initially unable to respond effectively, as its own mortar lacked ammunition. Supply boats eventually delivered mortar rounds to the defenders, allowing the fort to begin returning fire. On January 17, 1815, the American garrison launched a mortar counter-attack against the British vessels.

01 / The Origins

The bombardment of Fort St. Philip occurred during the final stages of the War of 1812, a conflict rooted in British interference with American shipping, impressment of sailors, and tensions on the northwestern frontier. In early 1815, British forces sought to control the lower Mississippi River by neutralizing Fort St. Philip, a key American fortification guarding the water route toward New Orleans, which had already repulsed a British land assault.

03 / The Outcome

Following the American mortar counter-attack on January 17, 1815, the Royal Navy bomb vessels withdrew from their position, ending the bombardment without capturing the fort. The British retirement secured American control of the lower Mississippi approach. The engagement took place amid the concluding hostilities of the War of 1812, shortly after the Battle of New Orleans, and before news of the Treaty of Ghent had reached the combatants in the region.

Belligerents & Mobilization Analysis

Side A

1 belligerent

Great Britain (Royal Navy)

Side B

1 belligerent

United States (Fort St. Philip garrison)
Outcome
British bomb vessels withdrew after American mortar counter-attack; Fort St. Philip held by the United States

Kinetic Engagement Axis

Major engagements timeline (1815–present)Timeline of major military engagements plotted chronologically.1815present1815Bombardment of F…Side B

Scroll horizontally to view full axis. Events plotted relatively.

Side A victorySide B victoryInconclusiveDecisive / turning point

Location

Map of Fort St. Philip, United StatesMap of Fort St. Philip, United StatesFort St. Philip, United States