The Battle of Tenekar, the Earth Union's first official contact with the Kor'vlann having sent a large-scale attack across several of the known worlds in sequence that began on Titan.

The advanced and effective artillery of the unknown species quickly wiped out the CASE troops that tried to deal with them, even for the prototype Warframes before their final upgrade it was not possible to hold off the Reapers for long, so that after heavy losses and having to stop the attack with orbital railgun fire, it became clear to humanity and zoosapiens that in the face of the new threat they would need better weaponry and innovations, giving birth to the Sprinter program a few months later that after 3 years of training and improvement to their soldiers, which was just when the species returned to make presence, they were able to face the Kor'vlann in a lesser way without producing more damage than the past battles.