A first home win under David Wagner sent manager, players and fans home smiling on Tuesday night.

Goals from Muzzy Carayol and Ishmael Miller secured victory in the last game at the John Smith’s Stadium before Santa visits Yorkshire.

Here’s five things we learned from the clash...

The defence can stand strong

Huddersfield Town v Rotherham Utd. John Smith's Stadium, Huddersfield. Joel Lynch shot.

After conceding two goals from set piece situations against Bristol City, fans had a right to be wary when discussing a starting line-up that was distinctly lacking in height.

In the opening minutes nerves were further frayed when the defence conceded a pair of free kicks in eerily similar positions from which the Robins scored.

However, on both those and subsequent occasions the threat was well dealt with.

In fact, the Millers were restricted to just three shots on target all evening.

Joel Lynch, outstanding on his return from injury, made a fantastic tackle to deny Danny Ward while Jed Steer pulled off the miraculous to prevent one effort squirming over the line after the post had saved Town at the first attempt.

Ward and fellow frontman Jonson Clarke-Harris were well shackled for the majority of the evening and it was a welcome clean sheet - the second in three games.

There is a role for Ishmael Miller

Huddersfield Town v Rotherham Utd. John Smith's Stadium, Huddersfield. Ishmael Miller.

Town fans are crying out for a new striker in January but the last two games have shown that Wagner has considerable faith in a striker already on the books in the shape of Ishmael Miller.

The forward is yet to start a game under Wagner, but has appeared off the bench in the last two matches, including at half time against Rotherham. The boss explained afterwards it was a tactical switch, rather than an injury to Nahki Wells, and Miller justified the decision.

Although he looks to be still adjusting to the new system, he held the ball up, tried to make a nuisance of himself and was rewarded by what was a very well-taken goal.

Manager and player shared a warm embrace at full time, and while Town may well open the chequebook for a striker next month, Miller has an opportunity to show he can flourish at the John Smith’s Stadium.

READ MORE: David Wagner: Our Christmas wish list by Huddersfield Town fans

READ MORE: Huddersfield Town 2 Rotherham United 0: Your reaction

There is life without Whitehead and Huws

Huddersfield Town v Rotherham Utd. John Smith's Stadium, Huddersfield. Duane Holmes.

A few eyebrows were raised when the team was announced to reveal Academy graduate Duane Holmes had been picked alongside Jonathan Hogg in midfield.

As well as battling with a slightly unfamiliar position, Holmes was battling potential rustiness - this was his first Championship start since April 2014.

However, the youngster impressed in the centre of the park, constantly busy and shuttling between the lines to good effect. He kept the ball well and was always looking to drive forward and make things happen.

Whitehead and Huws have been the standout first choice pairing, but it’s good to see the club has options without them. It was also a big positive to see a young, club-grown player step up when given the opportunity. Holmes set an example for others to follow.

Wagner is unafraid to make changes

Huddersfield Town v Rotherham Utd. John Smith's Stadium, Huddersfield. Mustapha Carayol.

The new style of play at Huddersfield Town requires a high level of commitment and fitness from the players. It’s clear to see Wagner’s charges have bought into his philosophy, but there were a few tired legs on Saturday.

Wagner showed he is happy to tinker with his starting line-up when required and made four changes to bring in fresher limbs - Joel Lynch, Harry Bunn, Duane Holmes and goalscorer Muzzy Carayol were all called upon.

The benefits of having a strong squad who are all familiar with the system is obvious - and when Emyr Huws and Martin Crainie return from injury at the weekend it will be interesting to see who drops out of the starting XI.

Fixtures are coming thick and fast, and having healthy competition for places can only be a help - especially when the players know the manager isn’t set on the same eleven names each matchday.

Tougher tests lie ahead

Huddersfield Town v Rotherham Utd. John Smith's Stadium, Huddersfield. David Wagner celebrates his first win.

It was a fantastic night at the John Smith’s Stadium but a note of caution should be sounded.

Rotherham now lie second from bottom in the Championship table, and following the final whistle Neil Redfearn pulled no punches by suggesting he needs a raft of better players in January if the Millers are to survive.

Saturday’s opponents, Brentford, are currently 10th while Town also face 12th placed QPR before the end of the calendar year. Both are likely to provide sterner tests than this one, and Wagner was right to allude to a period after half time when Town were more careless in possession and invited pressure from the visitors.

Although they struggled to test Jed Steer, the visitors had their tails up for that period and the game might have been different had they found the net before Miller effectively ended the contest.

However, it is vital when down closer to the bottom of the division to beat the team around you. From that point of view, Tuesday night was definitely job done.