Originally Posted by oudysseos
I was more thinking along the lines that it's generally assumed that by the time Caesar swept through Italy after crossing the Rubicon his veteran legions were at something like half strength, and the situation was probably much worse by the time he got to Pharsalus. Or in the case of Alexander, he sustained huge losses just crossing the desert of Gedrosia. Now I know that it's my choice to retrain my depleted units up to full strength, but there's no way to represent losing men due to a long march through hostile territory. I guess it's true that plague wouldn't be an ideal situation, but it just seems unfair to be able to bring a huge army across a desert and be ready to fight the moment you arrive.