Although he wasn't the oldest of Erik's children, he definitely wasn't a forgotten child; if anything, Erik was pretty good at distributing his wealth among all 12 of his kids and giving them an equal amount of attention. However, he also brought them into the fold as Trained Mercenaries.
His sons and daughters were all trained like Navy Seals, from physical combat to shooting and tactics. Each of his 12 kids was a monster in their own right, and while not all of them survived to the Descent of Arkadia, seven did.
Together with their father, the remaining seven members of the Colt Family transformed their Mercenary group into a powerful underground force in the Origin Timeline, burning through their funds to buy up all the resources they could when Arkadia appeared, and soon enough, Stillwater, returned to its former glory as a formidable force to be reckoned with.