Swindon chairman Lee Power has urged supporters to turn up and back the team in Saturday's local derby against League One leaders Bristol City.
Town are expecting 12,000 at the County Ground for the third-against-first encounter, including 3,000 away fans.
"We've got the big brother coming down from Bristol, thinking they are going to turn up take three points," Power told BBC Wiltshire.
"We're asking the people of Swindon to come out and look after their own."
Earlier this month, Power admitted he was concerned by Swindon's falling attendances, suggesting he may have to sell players to balance the books.
"It's the people of Swindon's football team and their club. We've got some big neighbours who are going to bring 3,000 rowdy supporters down with them," he said on Thursday.
"They're top of the league and unbeaten and we're up against it. I want this siege mentality in Swindon and I want everyone sticking together.
"We want to drive the boys on and send these 3,000 people back to Bristol unhappy on Saturday."
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Swindon sit seven points behind in third, having won eight and drawn five of their 16 matches so far, but go into the game after a 5-0 defeat by Cheltenham in the FA Cup.
Town came out on top at home to Bristol City last season when Nile Ranger scored an 87th minute winner to give Mark Cooper's side a 3-2 win.
And Power hopes to see the same reaction among the home crowd on Saturday.
"It was my favourite game of last season, and there were some good ones," he said. "Ranger came up with the winning goal and there were great scenes.
"Last year everyone was proud of where they came from and proud of their team and that's what I'm asking for this weekend."