It’s been a lengthy stint in the third tier for the Blues, but where does that place them among the sides in the division in terms of lengthiest stints?
We’ve ranked the 24 sides in order of time spent at the level, as Pompey bid to end their League One purgatory.
1. League One forever?
Pompey are facing their seventh season in League One next term - can they finally secure a route to the Championship? Photo: Alex Pantling
2. Blackpool
One season. Photo: George Wood
3. Leyton Orient
One season. Photo: Dan Istitene
4. Northampton
One season. Photo: Pete Norton