Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. USS Juniper (1864) -  USS Juniper (1864) was a steamer acquired by the Union Navy during the American Civil War. She was used by the Union Navy as a tugboat in support of the Union Navy blockade of Confederate waterways.
The answer is:
Mean Of Transportation