Stags won 3-1 in a penalty shoot-out following a 2-2 draw in normal time, courtesy of Lucas Akins’ stoppage-time leveller.
Chris and Jeanette Holloway captured these pictures of the home fans enjoying the night. Take a look and tag in anyone you know.
You can get all the latest reaction to this – and the weekend fixture at Gillingham – here.
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Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
. Mansfield Town 2 Peterborough 2 (3-1 pens)
Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
. Mansfield Town 2 Peterborough 2 (3-1 pens)
Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
. Mansfield Town 2 Peterborough 2 (3-1 pens)
Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
. during the Carabao Cup 3rd round match against Peterborough United FC at the One Call Stadium, 26 Sept 2023 Photo credit : Chris & Jeanette Holloway / The Bigger Picture.media:Mansfield Town 2 Peterborough 2 (3-1 pens)
during the Carabao Cup 3rd round match against Peterborough United FC at the One Call Stadium, 26 Sept 2023 Photo credit : Chris & Jeanette Holloway / The Bigger Picture.media:Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris Holloway:Chris and Jeanette Holloway
. Mansfield Town 2 Peterborough 2 (3-1 pens)
Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
1. Mansfield Town 2 Peterborough 2 (3-1 pens)
Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
2. Mansfield Town 2 Peterborough 2 (3-1 pens)
Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
3. Mansfield Town 2 Peterborough 2 (3-1 pens)
Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris and Jeanette Holloway
4. during the Carabao Cup 3rd round match against Peterborough United FC at the One Call Stadium, 26 Sept 2023 Photo credit : Chris & Jeanette Holloway / The Bigger Picture.media:Mansfield Town 2 Peterborough 2 (3-1 pens)
during the Carabao Cup 3rd round match against Peterborough United FC at the One Call Stadium, 26 Sept 2023 Photo credit : Chris & Jeanette Holloway / The Bigger Picture.media:Mansfield Town fans enjoy watching their side progress in the EFL Cup. Photo: Chris Holloway:Chris and Jeanette Holloway