The BUKs rose to prominence early in Halo's European competitive scene. At least as early as Insomnia 36, they were a part of Imperial eSports UK alongside Baadshah and Vard, where they took 3rd place. At Insomnia 37, the BUKs took 1st place alongside Baxter and MVP as team Crack Clan. The BUKs and Baxter decided to try their luck in America, joining Power Gaming alongside Reaction. They attended MLG Anaheim 2009, taking 19th place. Returning to Europe for Insomnia 38, the Power roster took 1st place. Returning to America for the MLG Orlando Championships 2009, Power took an improved 17th place finish. Power then picked up MVP in place of Baxter and returned for MLG Orlando 2010, where they took 21st place. Back in Europe, Power took 1st at the inaugural European Gaming League event - ECL 1 Liverpool. In their final Halo 3 event, MLG Raleigh 2010, Power took an impressive 10th place, famously upsetting Str8 Rippin in the process.
At the MLG Dallas 2010 Reach Exhibition, a new Power roster with Loco in Reaction's place took 5th place. At MLG Dallas 2011, Power took 19th. BUK 57 returned to America for MLG Columbus 2011 sans his brother, forming team PAOWA alongside Ghetto, Krunchy and Minority. They finished 28th. BUK 57 then returned to Power Gaming at ECL 2 Blackpool with the roster last seen in Dallas, and they ousted as ECL champions by FnaticMSI, taking 2nd place. The BUKs then joined the LowLandLions organization alongside Pinoo and Shinato. At ECL 3 Loughborough and EGL 4 London, they took 3rd place. Between EGL 3 and 4, BUK 57 returned to America once again to compete at MLG Raleigh 2011 alongside Ghetto, AhLeKZandRAWR2 and kAMANDAboom. They took a disappointing top 112 finish. The BUKs and LowLandLions returned to America together for the MLG Providence Championships 2011, where they took 17th place. After forming team Devastation alongside Riotz and Fuzion, the BUKs again went to America for the MLG Winter Championships 2012, where they took a top 16 finish. Returning to Europe for EGL 5 Blackpool now under apeX eSports, Devastation took 2nd place. The same roster, now under Western Wolves, took 2nd again at EGL 7 Blackpool. At EGL 8 Manchester, the BUKs returned with a new wW roster featuring JC and Fragby, taking 4th place.
Western Wolves attended the American MLG Fall Championship 2012 Halo 4 exhibition event, taking a top 32 finish. They also participated in a show match against the other foreign team - Team Immunity, which they lost. Back in Europe, with Inspired2Kill in place of Fragby, wW took a 3rd place finish at EGL 9 Blackpool. BUK 57 retired shortly after this event.
BUK 57 returned to Halo in mid-2015, coming out of retirement to reunite with his twin brother alongside Jimbo and Snipedrone on Epsilon eSports. The team attended Insomnia 54, where they placed 3rd. While the Halo 2: Anniversary circuit was still active in Europe, Epsilon were invited to the Gamescom Invitational 2015 Halo 5 showcase event, where they placed 1st. Returning to H2A for Insomnia 55, Epsilon closed the game out with a 1st place finish.
The Bucks and Epsilon stuck together going into the Halo World Championship 2016 qualifier series. They took 1st place at the UK Finals, qualifying for the EMEA Regional Finals. A short time later, Epsilon appeared at the X Games Aspen 2016 exhibition event as one of two invited European teams. Though they were able to upset the American Renegades squad, they ultimately failed to emerge from their pool and finished top 8. At the EMEA Regionals, Epsilon were upset in the Semifinals by Team Infused, but still placed top 4, a strong enough placing to qualify for Worlds. At Worlds, Epsilon turned heads by once again upsetting an American team in Pool Play - this time Cloud9. They amplified this in their next match against the dominant Counter Logic Gaming squad, who were favored to and would go on to win the event. They managed to take a game off the juggernaut squad and remained competitive in their three lost maps, proving that they could hang with the best in the world. They emerged from their pool as the only non-American team to make the Championship Bracket, where they lost to Team eLevate in the Quarterfinals and went home with a top 8 finish.
Shortly after Worlds, Jimbo announced the dissolving of the Epsilon roster, leaving the Bucks to form The Dinosaurs alongside Ramirez and Riotz. They failed in their first attempt at qualifying for the Summer 2016 Pro League, leading to Ramirez and Riotz leaving and being replaced by Flamez and Qristola. The new squad qualified for the season. Despite a strong start, Dinosaurs went on a long losing streak which resulted in them missing the Finals and facing Relegation. Dinosaurs survived Relegation, placing 2nd in the tournament.
After the season concluded, Dinosaurs replaced Flamez with Jimbo. Unfortunately, Jimbo and Qristola both ended up leaving shortly before roster lock, leaving the Bucks to bring back Flamez and recruit VexZeus for the Fall Season. On September 10, Dinosaurs joined the Prophecy organization. Over the course of the season, Prophecy failed to win a single match, finishing 0-10 and facing Relegation. In the Relegation tournament, Prophecy were swept by BitterSweet and defeated 4-1 by VwS Gaming, making them the first team in any HCS Pro League to get relegated.
During the offseason, the BUKs parted ways with Vex and Flamez, recruiting Morguhhh and Zhuh from team Egoed to form Pace Making Pandas. At Gfinity London 2017, the BUKs returned to elite-level contention, finishing 4th after notable victories over Supremacy and Epsilon eSports.