How do we know the doctrine of spiritual warfare is true?

The doctrine of spiritual warfare is deeply rooted in Scripture, with the narrative of Armageddon serving as a key illustration of this truth. Throughout the Bible, we see instances where God's intervention turns the tide of hopeless situations. Revelation 19 encapsulates this reality, painting a picture of Christ as the victorious warrior whose coming signals the end of the conflict. This victory is assured through God's promises and the prophecies that have been fulfilled, showing that while the struggle against evil continues, the final outcome is one of triumph for God's people through Christ.