Quintuple Alliance

The Quintuple Alliance was an alliance formed between the Gretian-Tyretian Empire, it's old ally the Kingdom of Setacolina, and the Hybro-Gorathic Empire and Grand Duchy of Kolangrad, who became interested in an alliance during the Abadaran Revolt. 
The Alliance is made up of three treaties, the Treaty of Alliance between Gretia and Setacolina, the Treaty of New Hybris between Gretia and Hybretia, and the Treaty of Ephesus between Setacolina and Hybretia. Sidonia is counted with Gretia in all signings. The Treaty of Ukorzen brought Kolangrad into the alliance a month later.
The treaty says that all states will assist others if they are attacked by a foreign power, but do not have to aide the state if they are the conflict's agressor. It also leases a military base in Setacolina to the Gretian Empire.