Gnolls are aggressive hyena like humanoids, they aren't very fun to have around for the fact that they fight for really anything and have almost no attentions span. Actually Gnolls are really dangerous for humans.
It's not uncommon seeing Gnolls kill each other for things like:
''You bastard! Don't you dare peeing on my tree I'm gonna kill you!''
So Gnolls are fighting each other most of the time and they are actually quite stupid.
But a particularly ''smart'' Gnoll managed to get all the other gnolls to actually listen to him and he organized various attacks against human villages.
How does a Gnoll slightly more intelligent than the other gnolls manage to get the attention of a large group of actual imbeciles?