Without a Fight stunned heavy favourite Vauban on Tuesday to win the Aus$8 million (US$6 million) Melbourne Cup, with jockey Mark Zahra claiming back-to-back victories in a dominant ride.
The seven-year-old gelding stormed clear in the final 100m to outpace Soulcombe and Sheraz in a thrilling finish to the gruelling 3,200-metre (two-mile) handicap at Flemington.
The Irish-trained Vauban, priced as the $5.50 favourite, finished a distant 14th in the so-called "race that stops a nation".
Second favourite Gold Trip, the horse Zahra steered to victory last year, struggled to 17th on a hot day.
"That's unbelievable, he was just an absolute gem today," said Zahra, who won the recent Caulfield Cup on Without a Fight and opted to stay with him rather than move back to Gold Trip.
"I was on a horse that you could just sit on, he has an electric turn of foot and he just pulled me all the way to the line," he added.
Zahra is the ninth jockey to ride back-to-back Melbourne Cup winners.
"Extraordinary. He got him onto the rail from a wide gate, relaxed, swam him off and I was pretty confident probably the (last) 800 metres he was travelling," said co-trainer Sam Freedman.
"He's a freak. He was excellent."
A cultural institution in Australia, the Melbourne Cup has been run on the first Tuesday of November since 1876 and is considered so important it is a public holiday in its host state of Victoria.
Held in front of an estimated 85,000 crowd, drinking and socialising took priority over racing for many, with the sound of popping champagne corks accompanying the thundering of hooves.
Breaking from barrier 16, Without a Fight settled in the middle of the pack behind early leader Serpentine.
With 1,000m to go, Serpentine was still ahead but was slowly reeled in down the home straight with Zahra hitting the lead in the final stretch and kicking clear.
The race was reduced to 23 starters after Cleveland was scratched due to an elevated temperature, dealing a blow to trainer Lloyd Williams' chances of winning an eighth Melbourne Cup.
Stricter veterinary checks have been introduced since the deaths of six horses associated with the Cup since 2013.
Williams's other horse, Serpentine, finished 19th after its strong early showing.
Retiring veteran jockey Damien Oliver, in his 32nd and final Melbourne Cup, was denied a record-equalling fourth win in his last ride, with his horse Alenquer coming 21st.
Kerrin McEvoy was also chasing a fourth win to match the exploits of Bobbie Lewis and Harry White, but he too was out of luck on Ashrun, which finished fourth.