It was not an easy task and there were plenty of ups and downs along the way.
Here are five key victories which helped earn their survival in the second tier.
Rotherham 1 Wolves 0 (16 August 2014)
This was by no means a classic as a Wolves side full of pace, trickery and attacking intent dominated the game and missed several chances to take the lead. They were then hit by a sucker-punch as Ryan Hall's only meaningful contribution in a Millers shirt gave his side the only goal of the game, flukily deflecting in a clearance from a corner. They all count and it proved vital in giving the Millers an early win, something that is so important in the Championship. Last time Rotherham were there they had to wait until the end of November to register the first win and Blackpool did it at the 11th attempt, with both proving there is no way back from a start like that.
Rotherham 2 Blackburn 0 (30 September 2014)
Performances had been decent, but this was the first time that the Millers had a sense of belonging in the Championship as for once a superb display had been matched with a result. It was the first 45 minutes where this game was won for Steve Evans' side as they blew Blackburn away. Kari Arnason gave them the perfect platform as he scored after just five minutes and a superb performance was rewarded in the 30th minute as Ben Pringle's relentless harrying resulted in Jason Steele's clearance smashing the legs of Luciano Becchio and into the net. The Millers then put up an impressive rearguard display after the break to see the game out and leave everyone thinking that they would be just fine.
Wigan 1 Rotherham 2 (20 December 2014)
The importance of ending a nine-game winning run cannot be underestimated as not only did it boost the Millers' chances of pulling away from the bottom three, but it also did more damage to Wigan, who were expected to come back strongly in the second half of the year. Although results had not followed, the Millers were playing well with a group of new loanees and there was a real sense of optimism. They produced the goods against a woeful Latics side and went ahead just before half-time as Tom Lawrence scored the only goal of his spell from Leicester. It looked as if missed chances would be costly as Ben Watson levelled for the hosts but a deserved three points were won by Alex Revell's final goal for the club. It stopped the Millers' rot, going into a winnable run of games, and ensured that Wigan's wretched home form continued.
Rotherham 2 Millwall 1 (28 February 2015)
The enormity of this game and the stakes involved was evidenced by the Millwall fans' reaction to conceding a late goal which saw Rotherham claim a vital win. After Arnason had headed home an 85th-minute corner, aghast visiting fans first chanted for Ian Holloway's head before trying to invade home areas of support. The match was so important as the Millers sat three points ahead of the Lions before kick-off and knew victory would make it difficult for Holloway's men to catch them. The afternoon started badly as Martyn Woolford put the visitors ahead, before Evans' men turned it around after the break. Danny Ward levelled within two minutes of the restart and then total Millers domination was rewarded with Arnason's header late on. The game will be remembered for the ugly scenes in the away end, but what happened on the pitch was much more important.
Rotherham 2 Reading 1 (28 April 2015)
The prize before this game was simple - if the Millers won then they would secure their Championship survival. After a season's hard toil and a points deduction, effectively their fate boiled down to a rearranged home game with a Reading side who had nothing to play for. The Millers endured a nervy first half, with the Royals more than matching their hosts before the decisive period in the game came after the break. The hosts scored two almost identical goals in the space of six minutes as Matt Derbyshire and Lee Frecklington converted from close range to put their side on the verge of safety. More chances came and went and it would not be Rotherham if they didn't do it the hard way, with Oliver Norwood's impressive strike from distance making it a tense and nail-biting final few minutes. But the hosts held on to spark scenes of joy at New York, with a third celebratory pitch invasion in three years at the Millers' new home. Evans, overjoyed with his achievement, pledged to wear a sombrero to the now meaningless game at Leeds and also had the final say on a war of words with Millwall's Lee Gregory. But for all that showmanship and point-scoring, first and foremost it was mission accomplished.
