But there is plenty of optimism to believe that Posh – who have played eight of the last ten season’s at League One level – can bounce straight back.
In fact as this table shows United are rated as one of the best sides at that level over the past decade.
You can get all the last Posh news, here.
1. Milton Keynes Dons - 599 pts
Milton Keynes Dons 405 166 101 138 104 599 Photo: Alex Burstow
2. Peterborough United - 545 pts
Peterborough United 359 157 74 128 101 545 Photo: Getty Images
3. Gillingham - 503 pts
Gillingham 402 129 116 157 -62 503 Photo: Jacques Feeney
4. Shrewsbury Town - 488 pts
Shrewsbury Town 404 122 122 160 -70 488 Photo: Lewis Storey