# When you march out to battle against your enemies

"When you go out to fight in a war against your enemies". Israel was not to worry about the power and strength of other nations. Instead, they were to trust in the power of Yahweh, who is the source of their military strength and protection. This is why a priest leads them into battle, rather than a military commander. 

# see horses, chariots

People considered an army with many horses and chariots to be very strong. 

# he who brought you up out of the land of Egypt

"Yahweh who led you out from the land of Egypt".