When the entity Q swinged the Enterprize continuous to the Delta Quadrant in 2365, the crew of the federation encountered the Borg for the first time. Since that day the Borg have been a continuous treat to the federation.

The first encounter with the Borg had two purposes. It showed that a race existed that is unappropriated and warlike. The worst thing of it all was that the Borg were now aware that the federation existed. A group of planets that would give the Borg powerful and new techniques if they would be assimilated.

The expected Borg attack happened in 2366. A single Borg ship invaded the Federation space and layed in a course towards Earth. The Captain of the Enterprise 1701-D, Jean-Luc Picard was captured and assimilated in the consciousness of the Borg. He was of crucial importance as Locutus of Borg in the Borg attack, he assisted the Borg with the destruction of 39 StarFleet ships. 11000 Federation officers lost their lives in that battle.

The savage attack ended when Picard was saved. A computer command was implanted, that destroyed the Borg ship when it was in orbit around Earth. Since the battle at Wolf 359 there have been at least three other Borg ships in Federation space. The last was most disturbing. One single Borg ship avoided the Federation attack, led by Picard and traveled towards Earth.

The ship went back in time to assimilate Earth on the moment of first contact ( when mankind proved that they could go faster then the speed of light ). Fortunately the Enterprize was able to pursue the Borg true time to stop them. Although the primary goal of the Borg seems to be pure acquisition, they are not acquainted with greed like the Ferengi Their primary goal is to improve the quality of life in the universe.

Their collective structure is what makes the Borg strong as a group: every Borg individual operates as an independent unit but all the Borg are continuously in contact with all the remaining members of the collective. They are all focused to obtain the goals of the collective. Even if they have to sacrifice themselves for that. These continuously communication contains that they can adjust as a collective on the experiences of one individual.