Ruler Of The World gives Aidan O'Brien another Derby success
Ruler Of The World provided Aidan O'Brien with a fourth Investec Derby and maintained his unbeaten record under Ryan Moore at Epsom - with favourite Dawn Approach well beaten.
Dawn Approach failed to settle from very early on and Kevin Manning felt he had no option but to take up the running on the approach to Tattenham Corner, with the writing being on the wall some way out.
Ruler Of The World (7-1) showed a smart turn of foot to go clear, but Battle Of Marengo, Galileo Rock and Ocovango all set off in pursuit.
The gap was closing at the line as Libertarian flashed home to claim second with Galileo Rock in third.
In the early stages Joseph O'Brien on Battle Of Marengo set a pedestrian gallop and with Dawn Approach wide with no cover and still pulling, Manning was forced to play his hand early.
Moore had the eventual winner just on the outside of Ocovango as the pace quickened and the French raider had to take a pull, forfeiting valuable ground.
Galileo Rock was handy throughout and stuck to his task gamely, outrunning his big price, but arguably the horse to take from the race was the unheralded runner-up, who was catching the winner with every stride, going down by a length and a half.
Battle Of Marengo was fourth, but Dawn Approach was eased markedly, beating just one home.
O'Brien said: "We're just so lucky, we get these incredibly-bred horses and even before they are mated the dream is for this to happen.
"The owners understand the game so much, they are given all the information and usually come up with a plan and we try and carry it out.
"All the jockeys had their own plan and all the horses were doing their own thing and that is just the way it ended up.
"This horse was impressive at Chester (winning the Chester Vase) and won like a very good horse.
"It's incredible, we're very privileged to be in the position we are."
Coolmore supremo John Magnier said: "Joseph had his choice (of what to ride from the Ballydoyle runners) and Aidan thought this horse was the next best.
"That's why the Derby is such an interesting race, as it is all unfolding.
"The weather has been so difficult, we haven't really been on the grass much and if you try to find out everything at home you are not going to win the Derby."
Moore said: "I wanted to be a bit closer, but I just didn't get away very well and it was a very messy race.
"I had no option but to go on when I did, I knew he'd stay the trip very well but I got there a bit soon and he was very green.
"He's improved a lot from Chester and he'll get further. He's got a really likeable attitude.
"I knew the others were coming because I'd gone too early, but he really toughed it out and showed a very good attitude."
He added: "I'm very lucky to be in this position and on these horses. This is the most important race for me."
Karl Burke, assistant trainer to his wife, Elaine, said of Libertarian: "He's a big unit but he's very athletic and I've never seen him lose his balance.
"Once he started making ground I thought he might be fourth or fifth, but then he really got going inside the last furlong and with 50 yards to go I thought he might get second, although he was never going to win.
"Stamina was never going to be an issue for him and why wouldn't we take on the winner again in the Irish Derby, the Curragh would be much more up his street but he will have to be supplemented."
David Wachman, trainer of Galileo Rock, said: "He ran well, we always suspected he'd run a big race so I'm happy with that and he should step forward.
"Wayne (Lordan) said he travelled well but was green when they straightened up and rolled around on the camber so he should improve.
"He's like his three-parts brother (Saddler's Rock) - he stays very well and is a grand horse, I wish I had a few more like him.
"He's in everything and we won't talk about anything until we see how he is."
Jim Bolger said of Dawn Approach: "Kevin said he jumped out all right and was was OK for about 10 strides but then he grabbed hold of the bridle and from then on he was more or less out of control.
"He'd been running over a mile where they'd been jumping out and going a good pace and Kevin could just let him bowl.
"I doubt he'll be running over a mile and a half again."
Manning told Racing UK: "He was relaxed going down and there was no indication of what he was going to do.
"We broke and then after 100 yards he started, it got competitive, as it does, he just lit up and basically bolted with me.
"I was a passenger and he took me completely by surprise.
"He got a bump but when I say a bump it just got tight, normal racing, and for whatever reason he just lit up and it was all over.
"We were going no pace so I wasn't going to maul him for a long way which was why I went to the front.
"I tried to get cover, that wasn't working so we went to the front but the damage was done by that stage.
"I knew before he took me to the front it was all over.
"I always thought his temperament was a big plus, it was surprising. It has shocked me because he's never shown me those signs at home."