Aled Thomas (with ball) secured a famous win for the Scarlets in Cork
The Scarlets' 13-6 away win to Munster was the highlight of what was a successful weekend for the Welsh regions in the RaboDirect PRO12.
Three of the four regions came out on top in their respective games with the Blues and the Dragons also securing wins.
The Ospreys were the only team to lose as a young side was narrowly beaten by Edinburgh.
With a number of players unavailable due to international fixtures and injuries, the last few weeks have seen the regional coaches give youth its chance. A lack of experience did not seem to matter for the Scarlets though as they claimed a famous win in what were appalling conditions in Cork.
With the rain and wind against them in the first half, Simon Easterby's side repelled wave after wave of Munster attack and Aled Thomas exchanged penalties with Ian Keatley as the sides went in level at the break.
Thomas added a second penalty after half time before Andrew Fenby's decisive score secured a historic win for the Welsh side. The win sees the Scarlets in second place ahead of a clash with league leaders Ulster at Parc y Scarlets next Sunday.
In Italy, Cardiff Blues got back to winning ways with a 7-14 win over bottom club Zebre. A try from prop Nathan Trevett and three penalties from the boot of fly-half Ceri Sweeney were enough to secure a win for Phil Davies' side.
The victory at the Stadio XXV Aprile sees the Blues move into ninth, one place and four points behind the Ospreys.
Despite defeat to Edinburgh at Murrayfield, a young Ospreys side showed the depth of talent available in the region with Matthew Morgan impressing at outside half.
Morgan scored all of the points for Steve Tandy's men including a try, a conversion and two penalties as his side raced into a 13-8 half time lead.
Sadly for the Ospreys youngsters, they were unable to hold on as the boot of Greg Hunter and WP Nel's try saw Edinburgh turn the tables.
In another fiercely competitive game at Rodney Parade, a Pat Leach try saw the Dragons secure their first PRO12 win since September.
Full back Tom Prydie kicked added three penalties as his side saw off Connacht for a much needed win.
Wales Head Coach Rob Howley talks to WRU TV's Sebastian Barrett about the 36-man squad he has just named for the forthcoming Under Armour series, which includes two uncapped players, Ospreys duo Sam Davies and Rory Thornton.
Head coach Rowland Phillips is deligthed he can now call BT Sport Cardiff Arms Park home for his Wales Women's side, who launch their international season next month with games against Scotland and UK Armed Forces in the heart of the capital city.
Wales Sevens star Sam Cross has put his home town club of Brynmawr on the map after winning a silver medal at the Rio Olympics with Team GB. His club have now honoured him by naming their players bar after him, as WRU TV discovered at the official launch, recently.
One of the newest members of the Principality Premiership, Bargoed admit it's proving to be a steep learning curve at the highest level, but are determined to become a force to be reckoned with. WRU TV visited the club last weekend when they took on Llanelli.
Table-topping Aberavon travel to north Wales to tackle RGC 1404 as both teams defend unbeaten starts to the season in the Principality Premiership. WRU TV's Graeme Gillespie visited the Wizards to see how their preparations were going for the game of the weekend.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.
Cardiff managed to keep their unbeaten record at home intact, but only just as Bridgend made them work extremely hard before the Blue and Blacks secured a hard fought Principality Premiership win at the BT Sport Arms Park last night.
Former Wales back row Andy Powell gives a guided tour of The Wern, home of Merthyr RFC, who are determined to prove a lot of people wrong and make their mark in their first season in the Principality Premiership.