If you need additional resources, you can contact a network of alliances you’ve forged to request money, reinforcement ships, and other support. The number of stars indicating the strength of relationship with each ally determines how often you can ask for their aid.
First, click the Intercom button, then select the ally you wish you contact. The type of aid they provide is shown when you hover over their portrait (note that “Support” increases morale). Asking for aid removes a star and if you run out of these you can no longer ask them for anything. You’ll need to rebuild that relationship later through dialogue and choices.
Click the Intercom button again to remove the portraits.