The Annie Larsen was a schooner

Schooner

A schooner is a type of sailing vessel characterized by the use of fore-and-aft sails on two or more masts with the forward mast being no taller than the rear masts....

 that was involved in arms shipment in the Hindu German Conspiracy during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

.

The ship came into the spotlight when it was seized on 25 June 1915 by US customs officials at Grays Harbour and found to be carrying large quantities of small arms and ammunitions in violation of the Neutrality Acts. The arms were meant to be transferred to the SS Maverick

SS Maverick

SS Maverick was an oil tanker built in 1890 for the Standard Oil of New York, later Mobil Oil. After the ship had changed hands sometime between 1910 and 1915, it was used during World War I as part of the Hindu–German Conspiracy to foment rebellion in India and overthrow the British Raj...

 at a rendezvous off the coast of Mexico. The Annie Larsen affair was one of the major setbacks of the failed Hindu German Conspiracy, and was one of the major charges in the trial that

Hindu German Conspiracy Trial

The Hindu–German Conspiracy Trial commenced in the District Court in San Francisco, California on November 12, 1917 following the uncovering of the Indo German plot for initiating a revolt in India...

was at the time one of the largest and most expensive in American legal history.