The author is missing some other things that alexandar's men would not have seen on their journey from greece to india.<p>[1] crocodiles
[2] tigers
[3] monkeys
[4] venomous snakes
( this is a major problem for moving at night)
[5] mosquitoes
[6] diseases ( with so much life, comes diseases )<p>He says alexandar would have won the war easily if he had attacked two months earlier. He had no idea about the heat in april and march. His horses don't stand a chance in the punjab heat. They would have lost more easily if they went two months earlier.<p>Alexander was accustomed to fight in temperate regions and deserts, where horses are very effective. Where as india is either tropical or sub-tropical, where horses don't do very well. What was once his weapon, has become his weakness.