15 thousand men died in the desert of thirst, sunstrokes and exhaustion.
With the 5 thousand men that had already left back home to Opal, only 30 thousand men remained of the original fifty thousand..
Of the 5 thousand horses, 1.500 died.
Which crippled the cavalry and was the final blow to moral.
The worst affected were the triceratops. Animals that were huge and heavy and needed lots of water.
The few drops of water they found here and there were not sufficient.
And soon they all died, spread out over the cracked desert soil.