I am pretty sure the game is designed so your army cannot travel too far. If it was possible, we wouldn't need colonies and a super power can conquer entire continent ![Smiley :)](https://forum.battlemaster.org/Smileys/default/smiley.gif)
Yes, it is designed so that wars over great distances are not easy. It is a bit odd to see so many flops be listed that aren't really game design problems, but are rather problems with the community itself.