User blog:HistoricalGamer/7 Key Subs In History

Hey Guys, it's 1Dev4, now known as HNerd. Today I am (inspired by Khoi) making a blogpost to test your opnion. To you, what is 7 key subs in history? Please, when you comment, watch your language and follow rules!

My Opnion

 * Hunley-First sub to actually sink a ship. But since it is basically a metal tube, itself was sunk in the torpedo blast...
 * Holland-First US navy sub. That is all I can think of.
 * U9-The best U-boat of WW1. Sank 3 heavy cruisers in 55 minutes...OP OVER 9000!
 * Gato, Balao, and Tench subs-Subs of USNPF. Best of Pacfic!
 * I400-Giant. BIG.
 * U-3008-Highly advanced XXI Uboat. All modern sub are based on 3008's design:streamline.
 * Natuilcus-1st nuclear sub. Most subs in USN are nuclear.