Because of the rough terrain (they bombed the roads), the Israeli Army needed pack animals for transport duty in southern
Maybe they were afraid of the pack mules of Lebanese smugglers. Those exotic animals have demonstrated their effectiveness in
Maybe those high tech gurus at Tsahal have not discovered Mules yet. What's next, pack rabbits? Jackalopes?
The fact is a mule can carry at least twice as much as the llama, and can be quite autonomous.
Lebanese smugglers rely heavily on mules, who are also smart enough to avoid army or customs patrols, and patient enough to hide.