"The Dwarves' Speciality"
The Sloan Family was strong, but they're not as strong as the 7 sacred or 7 great families yet, precisely because of these heavy vehicles.
Even the Billios Family had private bombers, navy and tanks, but the Sloan Family didn't.
Usually, mafia families had a few bombers, navy or tanks, but none of them had a lot expect for the 7 sacred families, 7 great families, and the mafia council.
The reason why the mafia society could stand against the government without getting wiped out was precisely that they had heavy vehicles for war.
The mafia society could produce special planes, bombers, thanks, and even the navy.
And one of the biggest heavy vehicle producers in the mafia society was precisely the Aretha Family.
The Walter Family also produces weapons and heavy vehicles, but in terms of bomber jets, tanks, and the navy, the Aretha Family was better.