Pioneer (submarine)
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Pioneer was the first of three submarines privately developed and paid for by Horace Lawson Hunley, James McClintock and Baxter Watson.
Hunley, McClintock and Watson built Pioneer in New Orleans, Louisiana. Pioneer was tested in February 1862 in the Mississippi River, and was later towed to Lake Pontchartrain for additional trials, but the Union advance towards New Orleans caused the men to abandon development and scuttle Pioneer the following month.
Their third attempt, H. L. Hunley, was the most successful one.