Take the key steps to becoming a Miles here! Complete ALL 3 SECTIONS. After you finish them, head on over to the Mark of Battle place to get the final mark (http://www.roblox.com/games/267347277/X-Legion-Mark-of-Battle). It will test you to see if you're a capable fighter and worthy of joining this fine legion.
If you're stuck on any portion of the Miles test, please don't hesitate to PM me. I am MORE than happy to help!