Siege of New Liverpool
Part of the American Front of Great War
Soldiers from the 2nd Infantry Division in action near Santa Clara River, 20 November 1954
Date 7 August 1953 (1953-08-07) – 2 March 1955 (1955-27-02)
(1 year, 6 months, 2 weeks and 5 days)
Location California and northern Mexico
Result Strategic British victory
British Empire
Franco-Spain Holy Alliance
Commanders and leaders
Douglas MacArthur
John F. Harding
Alphonse Juin
850,000 men 1,003,600 men
Casualties and losses
British Imperial Army:
Civilian:22,600 during the siege
Siege: 25,000+
British Offensives: 50,100+ to all causes

The Siege of New Liverpool, also known New Liverpool Blockade, was a prolonged military operation undertaken by the Franco-Spanish Army of New Spain and the Holy Alliance Pacific Fleet against New Liverpool—historically known as Los Angeles—in the American Front theatre of Great War. The siege started on 12 May 1954, when the last land connection to the city was severed.was a three-month siege by Central Pact forces led by the Franco-Spanish army and navy including its colonial forces. It ended with Central Pact forces retreating after three-months of fierce fighting and scarce supplies led to a successful offensive by Alliance forces. Although the British and American forces managed to open a narrow land corridor to the city on 18 June, lifting of the siege took place on 23 July 1954, 70 days after it began.