Blow by blow backstory of the big brouhaha! Boozy SARAH PALIN and her rambunctious clan get baked —  Alaskan-style!

Move over “Beverly Hillbillies” – here come the hard-partying, punch-throwing Palins!

With the battle cry “Don’t you know who I am!” former vice presidential candidate Sarah Palin turned into a pit bull as her clan was involved in a wild brawl outside an Anchorage home, eyewitnesses tell The National ENQUIRER.

The alcohol-fueled melee embroiled 20 people and is believed to have been sparked by the former Alaska governor’s allegedly drunken son Track, 25, said a source.

One victim, Connor Cleary, 26, told The ENQUIRER it was a peaceful party until the reality show family showed up!

Connor said he was approaching the Palins’ stretch-limo Hummer when Track began getting in his face. “He (Track) kept trying to pick a fight with me and then when it all came down – it happened,” Connor said, in an exclusive interview.

“He kept saying, ‘Oh what, are you trying to get into the —-ing limo?’ and he kept cursing at me and walking towards me,” claimed Connor.

Track allegedly threw two jabs at Connor, according to an online report – and that’s when all hell broke loose outside the residence of 39-year-old Korey Klingenmeyer, host of the Sept. 6 bash.

Alarmed, someone screamed, “This isn’t some damned Hillbilly reality show!” according to an eyewitness.

Despite several minor injuries, cops didn’t make any arrests because no one wanted to press charges, police spokeswoman Jennifer Castro told The ENQUIRER. “They (the Palins) among many other people were involved in the disturbance,” she disclosed, adding, “Alcohol was believed to have been a factor in the incident.”

Jennifer didn’t want to describe how Sarah was involved but noted that drunken arguments sparked the fight. An Anchorage blogger, who spoke to witnesses, laid the blame squarely on Track, who was apparently going after his sister Willow’s ex-boyfriend.

The fracas also involved “Dancing with the Stars” contestant Bristol, 23, claims the blogger, Amanda Coyne, who said “Word is that Bristol has a particularly strong right hook, which she employed repeatedly.

“As people were leaving in a cab, Track was seen on the street shirtless, flipping people off, with Sarah right behind him, and her husband Todd somewhere in the foreground, tending to a bloody nose,” adds the report.

The next day, the Palin saga continued when police busted a 25-year-old Florida man on felony stalking charges after he showed up at Bristol’s Alaska home. Hit with $25,000 bail, Peter P.W. Ferrero remains behind bars. He’s accused of inundating Bristol with about 1,000 Facebook messages and at one time targeted her 20-year-old sister Willow.