The Borg originated somewhere in the Delta Quadrant, it's not known where, or how, but their presence is felt all too often throughout the galaxy. It is assumed that the Borg once had a culture paralleling that of early Human history, but once they found out how to mesh biology and technology they began their ascent to supremacy. The Borg's culture includes thousands of different species, unlimited experience and knowledge - and all of this has been added since they left their homeworld for the reaches of space. Thousands of centuries have brought the Borg to where they are now, and as they strive on for perfection they move further through space.
    All known Borg related events are recorded below
2063

Stardate Unknown

    The partially assimilated USS Enterprise NCC 1701-E, under the control of the Borg Collective from the 24th century, attacks the Phoenix - Earth's first "warp ship" 
    The attack is unsuccessful due to the intervention of Lieutenant Commander Data of the Enterprise.
2143

Stardate Unknown

    The Borg assimilate Species 262, learning of particle zero-one-zero - what the Federation calls 'The Omega Particle'.
Late 23rd Century

Stardate Unknown

    The Borg swarm through the El-Aurian star system - assimilating everything and everyone that can not get out in time. Guinan and Dr. Tolian Soran are survivors of the attack - both losing all family in the process.
Early 24th Century

Stardate Unknown

    A Borg ship locates and assimilates the home planet of the Sekari. Some Sekari manage to escape into caves where they are undetected. 
2356

Stardate Unknown

    The starship Raven - piloted by the Hansen family - strays into the path of a Borg vessel, the Borg attack and after removing the family and beginning assimilation the Raven crashes onto an unpopulated planet.
2364

Stardate Unknown

    A Borg ship passes between the Federation and the Romulan Star Empire, removing both parties' outposts along the Neutral Zone. Each power blames the other - re-igniting conflicts after decades of peace.
2365

Stardate 42761.3 

    A 'Q' entity places the Federation starship Enterprise in the path of an oncoming Borg cube some 7,000 light years from Federation space, in a system designated J-25. Initial hostile encounters render the Borg's defences immune to the Enterprise's weapons - after intervention from the 'Q' the Enterprise is replaced in friendly territory. 
    However, this one incident alerts the Borg to the Federation's technological capacity and it is thus targeted for assimilation.
2366

Stardate 43989.1 

    A Borg cube enters Federation space months ahead of the date projected by Starfleet Tactical - within days the Jouret IV colony of New Providence is assimilated and the USS Lalo is destroyed. The starship Enterprise is the second ship to engage the Borg, initial attacks prove useless and the Enterprise flees. After another pursuit the captain of the Enterprise - Jean-Luc Picard - is captured and assimilated into the Collective as a voice for the Borg and a companion for the Borg Queen. In response to the invasion Starfleet ships amass at Wolf 359 - in the ensuing battle 39 out of 40 Federation ships are destroyed, with a loss of approximately 11,000 Starfleet personnel. The Borg ship reaches Earth but before it can begin assimilating the planet the Enterprise attacks once more and using the subspace link of the captured Locutus the crew manage to destroy the cube.
2368

Stardate 45854.2 

    A Borg scout ship crashes on a small moon in the Argolis cluster. Out of the five Borg onboard only one - designated Three of Five - survives. The USS Enterprise is on hand and rescues the Borg, and after nursing it back to health the crew begin planning to use an invasive program within its neural processor as a weapon to destroy the Collective.
    But unexpectedly, due to the Borg's subspace link with the Collective being degraded, he begins to show signs of individuality. Eventually being nicknamed 'Hugh' by Lieutenant Commander Geordie LaForge, he begins to refer to himself as "I" instead of "We" and so Captain Picard disregards the plan as immoral and 'Hugh' is returned to the crash site for pickup by the Borg rescue vessel.
2369

Stardate Unknown

    Three of Five ( Hugh ) is re-integrated into the Borg Collective and his individuality spreads throughout his ship - destroying the link to the Borg. Without the reassuring voice of the Collective the Borg begin quarrelling amongst themselves, some shut themselves down, and some starve to death.
2369

Stardate 46982.1 

    The Soong-type android, Lore, discovers the Borg individuals. He gives them the commanding voice which they seek and convinces them to follow him in an attempt to destroy the Federation. The first target of the rogue Borg is the outpost of Ohniaka III - a facility with no strategic importance. 274 Starfleet personnel are killed and the USS Enterprise arrives too late to intervene. A second encounter with the Borg ship results in one dead Borg and one captive - the drone named Crosis.
    After Crosis escapes - taking Lieutenant Commander Data with him - he is tracked to a Borg compound, where an eventual battle leaves Lore deactivated and Crosis and many other rogue Borg dead.
2372

Stardate Unknown

    The Cataati race is assimilated.
2373

Stardate 50614.2

    A disabled Borg cube is located by the crew of the starship Voyager, further investigations reveal the location of a large amount of drones from the ship - now split from the collective by the same occurrence which disabled their vessel, they revert to their original personalities, bringing their racial biases with them. This leads to fighting and territorial disputes begin.
    With the assistance of the unwilling Commander Chakotay the Borg re-initiate the cube's central systems - allowing them to re-connect their minds across the planet and form, what they term, the Borg 'Co-operative'. They destroy the Borg ship to protect the Starfleet vessel.
2373

Stardate 50893.5 

    Another Borg cube attacks the Federation, initial defences in the Typhon sector break down and the amassed fleet is pushed back to Earth, where, with the assistance of Captain Jean-Luc Picard's weak link to the Collective, the cube is destroyed. 
    A Borg sphere is launched from the exploding vessel though, and travels back in time to 2063, where, followed by the Enterprise-E, it is destroyed. However, Borg drones and the Borg Queen transport aboard the Enterprise undetected and begin assimilating the ship. After a pitched battle deck-to-deck the Enterprise is almost totally lost, when Lieutenant Commander Data punctures a plasma coolant tank which releases coolant into Main Engineering and vaporizes the Borg Queen's organic elements - destroying the temporary Borg Hive.
2373

Stardate Unknown

    The Borg begin experimenting with inter-dimensional travel. Locating a realm they term 'fluidic space' they begin to attack the species which inhabits it. The species - designated 8472 - retaliates, and, believing the Milky Way galaxy to be impure, begin destroying the Borg. The genetically perfect race repels all attempts at assimilation and destruction and in a short space of time destroy hundreds of Borg planets, thousands of vessels and millions of drones.
2374

Stardate 50984.3 

    With the assistance of the Federation starship Voyager the Borg develop a weapon against Species 8472 - a torpedo is designed to carry several million modified Borg nanoprobes which attack the aliens at the cellular level. The weapon is effective and the 8472s are forced back to their own realm.
2374

Stardate Unknown

     After Species 8472 retreat to fluidic space the Borg assimilate Species 116.
2374

Stardate 51978.2

    A member of Species 116 attempts to wreak revenge on the crew of the starship Voyager, whom he blames for his race's destruction at the hands of the Borg. However, his plan misfires and he himself is delivered to his former home system where a group of Borg cubes are sat in orbit of his homeworld, his ship is quickly assimilated.
 
    More stardates to come!