Hey, if you would be interested in joining a community of Halo players with 9 years of experience, you may want to check out Forerunner Conflict.
I am First Lieutenant Barry Soap (XBL GT) and I am a part of REDD army.
Forerunner Conflict was founded on June of 2006, by a group of players seeking a more mature environment. It then developed a war simulation and a lite-competitive edge, as we hopped across 3 consoles, from H2 to H3, from H4 to Halo: MCC.
Still going strong, our website is now host to over 4,000 members, but we are seeking as many active players going into Halo 5 as we can. It'd be awesome if you considered us, and please send a message to Barry Soap over Xbox Live if you have any questions or concerns.
Thanks for reading. :)