US Navy Flag led his rivals a merry dance in the Darley Dewhurst Stakes as Aidan O'Brien saddled the first four home in the Group One at Newmarket.
The Ballydoyle colt was a 5-1 shot to secure a second Group One on the bounce following his Middle Park Stakes triumph a fortnight ago.
Ryan Moore controlled the pace from the front before kicking for home and U S Navy Flag readily brushed aside his opponents to claim an impressive two-and-a-half-length victory.
Stablemates Mendelssohn, Seahenge and Threeandfourpence finished second, third and fourth respectively.
US Navy Flag provided O'Brien with a 24th top-flight success of 2016, leaving him just one short of the record set by American trainer Bobby Frankel in 2003.
Moore told ITV Racing: “He’s been a remarkable horse. From the middle of the summer we’ve started to work him out.
“He’s very tough. I thought it was going to be a very good Dewhurst.
“To win a Middle Park and then to come and win a Dewhurst is great and he was strong at the line.
“It’s a massive feat again, what Aidan has done.”
US Navy Flag is a full-sister to Roly Poly, who secured her third successive top-level win in last weekend’s Sun Chariot Stakes.
“They’re amazingly similar,” Moore added.
“Neither of them are the biggest, but they’ll both give you absolutely everything. This lad would have a little more substance about him.
“They both seem to keep getting better every time they come to the track.”
