"'You will not need to fight in this battle. Stand firm, hold your position, and see the salvation of the Lord on your behalf, O Judah and Jerusalem.' Do not be afraid and do not be dismayed. go out against them, and the Lord will be with you."
2 Chronicles (ESV)
When we concentrate on our ability to fight, we limit our ability to fight. When God fights for us, no one can stand against us.
However, that means that He is fighting for us. To take on battles that are ours, not His, and hope He fights for us is not right. The battles that God fights are His battles, not ours. He is not "on call" waiting for us to give Him marching orders. He is the one at war, the one with the battle plan, and the one giving the orders.
The battle is not ours; it is His. He will fight such a battle, and we, because we have yielded to Him, will win.
This life is a war zone. We are at war whether we want to be or not. Only the dependent win, so stay dependent.