Starpoint Gemini Warlords by LGM Games.

Capital Ship Space conquest/combat/trade/mining scifi game. Campaign and sandbox play options (Campaign continues on in Sandbox) Start off as a small faction vying for dominance in the galaxy, make friends, declare war, annihilate planets for force factions to your faction, build Combat and Civilian fleets to follow you into battle, go off and combat alone, and send Civilian fleets to collect resources.

If you liked Freelancer style games from the past, SPG Warlords has a similar feel, backed up by a great Development Team and Steam Community.
http://store.steampowered.com/app/419480/Starpoint_Gemini_Warlords/
https://starpointgemini.com/

Good luck to all that enter!