A well done overview of the ever versatile submarine from its birth in the days of the US War for Independence in 1776 to the steroid fleet of the Titan subm.\rbr\rbrA well done overview of the ever versatile submarine from its birth in the days of the US War for Independence in 1776 to the steroid fleet of the Titan submarines .\rbr\rbrFocuses on US submarines in the Pacific Ocean. history life discovery science technology tech learning education national nature geographic earth planet .\rbr\rbrThe First Nuclear Submarine in The World Military Channel Documentary.