Annie Larsen affair

The Annie Larsen affair was a gun-running plot in the United States during World War I. The plot, involving India's Ghadar Party, the Irish Republican Brotherhood and the German Foreign office, was a part of the larger so-called "Hindu–German Conspiracy", and it was the prime offence cited in the 1917 Hindu–German Conspiracy Trial, described at the time as the longest and most expensive trial in American legal history.