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.
Warren Gatland and Sam Warburton look ahead to this week's crunch RBS 6 Nations tie against France, where the Wales skipper in particular is keen to make his mark, as Paris has proved a bleak place for him in the past.
Reaction from Scotland and a special focus on Welsh Women's rugby in this week's Principality Welsh Rugby Union Podcast. We hear from Wales captain Sam Warburton and coach Warren Gatland, as well as Wales U20 reaction from forwards coach Geraint Lewis, along with Josh Adams and Olly Griffiths. There is also a special focus on Welsh Women's rugby with coach Rhys Edwards, as well as hearing from clubs Bedlinog, Penybanc, Kidwelly and Skewen. We also speak to volunteer of the year, Sue Davies on Whitland and the Scarlets.
Following their historic win over England, Wales Under 20 suffered a narrow, 36-34 loss to their Scottish counterparts last weekend, despite outscoring them by five tries to three. Watch the match highlights and reaction.
Disappointment at the Millennium Stadium, but don't be sad because two out of three is not bad in this week's Principality Welsh Rugby Union Podcast as the 20s and Women both win. We hear from Sam Warburton, Dan Lydiate, Alun Wyn Jones, Jamie Roberts and Leigh Halfpenny about the defeat to England and looking forward to Scotland. Wales U20s captain Ollie Griffiths, back Josh Adams and forwards coach Geraint Lewis talk about their victory over double world champions England, while Wales Women also beat a world championship winning England team - we speak to backs Elinor Snowsill, Ade Taviner and Laurie Harris.
England coach Stuart Lancaster gives his verdict after seeing his skipper Chris Robshaw lead his side to victory against Wales at the Millennium Stadium in the opening game of the RBS 6 Nations championship.