Bromley beat London rivals AFC Wimbledon 2-0 through goals from Michael Cheek and Corey Whitely in their first-ever home match in the English Football League.
Cheek struck low into the corner to give the home side the lead late in the first half with his second goal of the season.
Whitely doubled their lead on the hour mark, drilling home after a long run and ball into the box from Danny Imray.
The victory takes Bromley up to a maximum six points from their opening two games in League Two.
Defeat was the Dons first of the new campaign.
Hayes Lane was sold out for Bromley's first home game in League Two and Whitely almost got the home side off to the perfect save, forcing a strong save from Wimbledon goalkeeper Owen Goodman.
A neat piece of skill set James Ball free down the left for the Dons, with his deflected cross going all the way through and behind for a corner.
Bromley made the breakthrough on 35 minutes, with Cheek and Whitely combining before the striker finished coolly into the bottom corner to give the Ravens the lead.
Whitely doubled the lead on the hour, taking down Imray's ball and finishing well past Goodman.
Bromley goalkeeper Grant Smith was called into action to make a double save from Josh Kelly and Josh Neufville.
Wimbledon had 62% possession but were unable to convert their chances as Bromley secured a deserved three points and a degree of revenge after the Dons' victory of them in the Carabao Cup on Tuesday.
- Published16 August
Bromley fans chant 'We are top of the league'
Regardless of the result, this was always going to be a big occasion for Bromley – playing in front of their home fans in the EFL for the first time in their 132-year history.
Having won promotion via the play-offs at Wembley in May, their old artificial surface was ripped up at Hayes Lane and replaced by a brand new, £750,000 hybrid turf pitch.
Up against a rival from the club’s Isthmian League days, the match was a sell-out.
After Whitely's second goal put the Ravens in control, the home fans were chanting "We are top of the league!" as their team saw out the result.
What the managers said
Bromley boss Andy Woodman told BBC Radio London:
"My boys know the system, they know the drill and they executed it today perfectly.
"Cheeky does what he does. A lot of people have said to me, 'can he do it at this level?'
"Look, the guy's not quick, he's not got the best touch, he doesn't rely on his pace or anything like that, but he just scores goals and that's a gift in itself."
Wimbledon boss Johnnie Jackson said:
"I thought we were the dominant team with the ball, we had more possession and more final-third entries but we didn't have enough to show from that.
"And we got done in transition in two moments for the goals and that's disappointing. We're frustrated with the goals, definitely.
"It was an even game, small moments have decided it. They took their chances."