HELP Battles at level 1

[dilkboor]

i ve gathered a small figting force and i guess i have to attack kingdoms in order to get some experience but when i do i always lose tough the opposite has no units:
Your army:
12
Enemy army:
0

Can you explain me that? thank u very much

[j0hn_c3na]

Even if the enemy has no army, his population (unnarmed peasants) count towards his defense.

If he has a large population he can easily have more defense than your army's offense.