First Federation

The First Federation was a political and military organization in the Milky Way Galaxy. First contact between the Federation and the First Federation occurred in 2266, when the USS Enterprise (NCC-1701) was conducting a star mapping mission and unknowingly crossed into First Federation space, destroying a marker buoy in the process.

Shortly thereafter, the Enterprise encountered the massive flagship of the First Federation, the Fesarius. Charged with violating their territory, the Enterprise and its crew were threatened with destruction. However, after a series of bluffs and counter-bluffs, it was discovered that the encounter had only been a test, designed by the Fesarius' captain, Balok. A cultural exchange was proposed, with Enterprise crewman Dave Bailey remaining on board the Fesarius. 

In 2270 the two federations had become trade partners in technological exchange program. (Star Trek: Eagle)