Great Britain took the honours in the Nations Cup at the RDS as a a combined total of eight faults saw them lift the Aga Khan trophy for a 26th time.
The Netherlands were second with a total of 12 faults, while Ireland and Germany shared third place on 16 faults.
The British quartet contained three London 2012 gold medallists - Scott Brash, Nick Skelton and Ben Maher - and they delivered in style.
Brash delivered a double clear round on his London horse Hello Sanctos, while Skelton (Big Star) and Maher (Cella) also jumped clear in round two.
Ireland’s performance means they will also be among the six qualifiers from their European group to progress to the final in Barcelona.
Team manager Robert Splaine outlined his disappointment at failing to retain the feature event at the Dublin 4 venue.
Splaine said: "The team so much wanted to win, especially for the huge crowd who turned out to cheer us on.
"The lads worked hard, but in the end the British team, which included three of their Olympic Gold medallists, was just too good.
"The Aga Khan was also very important for Ireland in the context of next month's European championships, and I will be spending the next few days analysing the performances here today."
Great Britain team manager Rob Hoekstra commented: "I am absolutely delighted with the result. What more can I say?
"Scott was fantastic, and both Ben and Nick put in brilliant clears in the second round.
"We can now head to the European Championships in Denmark knowing that we have done enough to secure our place in the Nations Cup final.
"It is almost a year to the day since we won gold at the London Olympics, and to win the Aga Khan Trophy today is a fabulously fitting finish to what has been a tremendous 12 months."