Forest Green will face Exeter City, Swindon Town and West Bromwich Albion U21s in EFL Trophy Group E.
The latest confirmed dates are as follows:
Exeter City (A) - Tuesday 8 September (5.30pm)
West Bromwich Albion U21s (H) - W/C Monday 5 October (TBC)
Swindon Town (H) - Tuesday 10 November (7.00pm)