Has God promised that He would fight and defeat our enemies/oppressors for us? I would say, “YES” is the answer to that question. Please read:
Exodus 7:4-5
4 he will not listen to you. Then I will lay my hand on Egypt and with mighty acts of judgment I will bring out my divisions, my people the Israelites.
5 And the Egyptians will know that I am the Lord when I stretch out my hand against Egypt and bring the Israelites out of it.”
Isaiah 41:1-4
1 “Listen in silence before me, you lands beyond the sea. Bring your strongest arguments.
Come now and speak. The court is ready for your case.
2 “Who has stirred up this king from the east, rightly calling him to God’s service? Who gives this man victory over many nations and permits him to trample their kings underfoot? With his sword, he reduces armies to dust. With his bow, he scatters them like chaff before the wind.
3 He chases them away and goes on safely, though he is walking over unfamiliar ground.
4 Who has done such mighty deeds, summoning each new generation from the beginning of time? It is I, the LORD, the First and the Last. I alone am he.”