Stele of Vultures was commemorated after a particular battle in which the king Eannatum of Lagash sent a single solider called a Hastati to a neighbor province that he had agreed to a mutual aide pack of forces.
The fears of this neighbor where satisfied when they defeated the invading force and Kind Eannatum erected the Stele IMHO it was a message for future generations accept the aid or be picked apart by the lions and vultures.