The following link is to an article from Sunday's Newsday. It is about a book that Oyster Bay town historian John Hammond has put together. The book provides information about Long Islander's who served in the Civil War based on the Town of Oyster Bay's official records. The article provides interesting information about both the Civil War and Long Island.
http://www.newsday.com/long-island/nassau/oyster-bay-historian-pens-civil-war-book-1.2716041