If you do not find the Latin phrase you are looking for on this page, here are more Latin phrases about strength and power:
ipsa scientia potestas est
Knowledge itself is power. (Sir Francis Bacon)
divide et impera.
(Philip II of Macedon, father of Alexander the Great)
Divide and conquer.
The final argument.
mens sana in corpore sano (Juvenal, ancient Roman poet).
A sound mind in a sound body.
Nervi belli pecunia infinita
Plenty of money is the sinew of war.