The War of 3039 was a turning point in the Inner Sphere.
It was when the Federated Commonwealth Juggarnaut as turn aside by the determination of the Dragons of House Kurita. It was also the beginning of a technological reawakening testing a number of new systems that had not been seen since the days of the Star League.
Or that is how it was in the Battletech world, You will determine how it turns out.
Salcor as the GM