Conflict and warfare are a normal part of Christian living.
2 Corinthians 10:3-4
For though we live in the world, we do not wage war as the world does. The weapons we fight with are not the weapons of the world. On the contrary, they have divine power to demolish strongholds.
2 Timothy 2:3
Endure hardship with us like a good soldier of Christ Jesus.
Ephesians 6:12
For our struggle is not against flesh and blood, but against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms.