The Borg Mutual Defense Pact: signed in 2385 between the Federation, the Romulan Star Republic, The Klingon Empire and the Gorn Hegemony. This pact states that in the event of a Borg invasion into any of the signatories, the other signatories will commit resources and ships to combat this threat. The Cardassian Union is in talks to join the pact.
The Confederacy Agreement: signed in 2385 between the Tholian Assembly, the Tzenkethi Coalition, the Talarian Republic and the Confederacy of Systems. This pact creates a free trade agreement with these powers and formal diplomatic relations with the Confederacy.