Chain of Fools
The Chain of Fools is an army that operates based on an obvious assumption: meat shields work. The army gains its meat shields by offering a solution to parents with moronic children: they can join the army. The Chain of Fools pays well. They offer respect and the good future to those with intelligences too low to expect much out of life. For those who survive a campaign, the rewards are worth it. For those who do not, well… there are always more idiots out there to fill the ranks.
Any mercenary group that hopes to succeed will pay its foot soldiers handsomely, and the Chain is no exception (though really they don’t have to pay as much since their soldiers aren’t that smart), but the real money is in leadership. Occassionally, they promote from within, but for the most part, the Chain is composed of a elite core staff of support and leaders. The leaders of the chain are not idiotic in any way, but specialize in directing masses of low intelligence soldiers into doing their bidding.