Alexander after withdrawing from Hyphasis and conquering Mallian reached the Sea. He sent his Navy back by sea across the Persian Gulf to Susa under the command of admiral Nearchus. He took his Army on a march through the Gedrosian desert. A third of his Army was lost due to its harsh conditions. Why didn't Alexander sail all of his troops accross the Persian Gulf and avoid desert climate just like the Romans sailed thier armies across mediterranean?
