Why was I set back to warrant officer

a few months ago i signed into xbox live went to play halo reach and i went from grenadier level 3 to warrant officer grade 1 is there any reason why this happened and is there anyway i can get my progress back. there was no notification and i am not a Modder or hacker

Good morning.

Was this the first time you signed onto LIVE while playing Reach at the same time? Bungie implemented a system when the created Reach that when a player logs onto LIVE for the first time while playing Halo: Reach where some, usually most cR a player earned is removed as a method to counteract cheating and boosting. This is done to prevent rank cheating, so people don’t ill-legitimately get to the rank of inheritor offline then sign onto LIVE for the first time while playing and have the Reach servers update.

If so, then this is the answer to your question. However, if you have played Halo: Reach in the past while connected to LIVE already, you need to make a post here as that sounds like some type of bug or error. I hope this helps and have a nice day now.

that is most likely what occurred