Board Thread:New on Red vs. Blue Wiki/@comment-76.14.20.105-20131013055057/@comment-3496661-20140617153408

I would say 3-5 years, each season doesn't take exactly one year, specifically the Blood Gulch Chronicles. Seasons 4 and 5 take place moments after each other and Reconstruction takes place, according to Caboose on the DVD, one year after Season 5.