William M. Van Fossen answered the siren call of the 1849 Gold Rush to California, seized upon the "filibuster" adventures of a General bent on South American conquest, placed his life on the front lines of the Civil War, and, finally, returned to Shelby County for an honored retirement.

Van Fossen, born in Butler county in 1832, was brought by his family to Port Jefferson as a boy. He became a farmer and never had a day's schooling in his life. Van Fossen later pursued his education, but…"When twenty-one years of age he scarcely knew the alphabet, and could not write his own name" (Sidney Daily News--SDN, Feb. 6, 1906).

He gold rushed to California with his father in 1849, but they started home via Nicaragua the next year. He left his father on the way home and shipped on a schooner running on Lake Nicaragua. He served on that vessel for three months, according to Sutton's History of Shelby County, but then sailed to San Francisco, "where he enlisted under Captain Crabb as a filibuster for General Walker's expedition to Central America." He had fallen under the spell of the "Manifest Destiny" adventures in South America made famous throughout the 1850s by General William Walker.

Gen. Walker's filibusters believed that the "United States, following its destiny, would eventually annex the entire Western Hemisphere from the Arctic snows to Cape Horn" (American Heritage, Dec. 1957). As soldiers for hire or mercenaries, they were willing to undertake adventures in South America conquest that the United States government was unwilling or unable to do. "The men who followed this highly dangerous way were called filibusters--a term used then in its most masculine sense, meaning freebooters, and not, as now, windy and obstructive politicians," American Heritage author Edward S. Wallace said.

There was a pro-slavery angle to this adventure in which Van Fossen became caught up. Walker, rebuffed in his diplomatic overtures to the government at Washington, was casting his lot with the southern states in the impending Civil War. There is reason to believe that some of the southern leaders shared Walker's dream of a Latin American slave union as an ally in their own struggle" (Wallace). Van Fossen escaped the clutches of manifest destiny with relatively minor difficulty. He and his filibustering comrades were captured on the high seas on their way to Central America by a U.S. man-of-war ship and put ashore at Acapulco. They returned by land to San Francisco, where more adventure awaited Van Fossen.