The troops from C company, second battalion, The Royal Welsh received a standing ovation from more than the five and a half thousand supporters at the stadium.
Captain Alex Rabbitt, Sniper Platoon Commander, who led the parade of honour at Parc y Scarlets said: "Having only recently returned from Iraq last Christmas we have now completed and returned from our first tour of duty in Afghanistan.
"It was a very hard six months and it is now really nice to be back home with our friends and families. A number of our troops are Scarlets supporters, so we were delighted to be part of the region's 1st anniversary celebrations.
"It is really good to be able to attend events such as the Scarlets match on Saturday as it reminds the public of the conflict in Afghanistan and the soldiers that are still serving there."
And to honour the Royal Welsh, the Scarlets team played in their Welsh 'green' away kit as a mark of respect for the soldiers. The away kit was chosen by the Scarlets to symbolise the region's Welshness and incorporates the colours of the Welsh flag with green being the prominent colour.
The Scarlets team celebrated their new home's first birthday in fitting style - cruising to a comfortable 32 -17 win against Worcester Warriors.
And stadium bosses were pleased with the turn-out of more than 5,500 given the conditions and were equally delighted with how well the high tech playing surface at Parc y Scarlets stood up to the deluge of rain it received. A number of rugby games were cancelled across Wales and England but the ultra-modern drainage system at the Scarlets home ground helped to ensure the surface remained in top condition.
Chief Executive, Paul Sergeant said: "One year on, we'd like to think that this 15,000 capacity state-of the-art rugby stadium is feeling more and more like home for the region's supporters and sponsors, the Scarlets players and staff.
"There was a great atmosphere again in and around the stadium again at the weekend and we can only thank our loyal supporters for making it happen and coming down despite the weather. It was a great afternoon's entertainment on the pitch and we were very pleased to welcome and honour the soldiers from the Royal Welsh.
"We should also thank the grounds staff for the excellent job they continue to do in maintaining our stadium playing surface to very high standards - it stood up very well despite the testing weather it was faced with."
The Scarlets now look forward to some thrilling rugby games in December.
The Scarlets' next home game is against Edinburgh on Friday 4th 2009 in the Magners League with a kick off time of 7.05pm. The Scarlets are planning some special match day entertainment for this game - details to be released soon!
And tickets for the hottest Christmas date in town - when the Scarlets play Leinster in the big European Cup clash on December 12th - go on general sale this Thursday 19th November 2009 at the Scarlets ticket office. Call 0871 871 8088 to secure your seat at this very important home Heineken Cup fixture.