8 Deadly Fighting Styles You've Probably Never Heard Of

6. LINE

LINE, or the slightly less snappy Linear Infighting Neural override Engagement is a combat system used by the US Marine Corp in the 90s, and the Special Forces in the 2000s. It is basically designed to be as deadly as possible in the most difficult situations. The requirements are that the techniques must be lethal in the most difficult circumstances, and were designed to be executed in limited visibility, under mental and physical fatigue whilst wearing full combat gear. When performed correctly, the techniques should almost always result in the death of your opponent. The practice is no longer as widely used, partially due to its inflexibility, but also due to the fact that it is very much inappropriate in peacekeeping operations.