Philippians is an interesting book.
The city of Philippi was basically a Roman military retirement community named after Phillip the Great who was Alexander the Great’s father. Honor, shared sacrifice and obedience to authority were some of the military virtues St. Paul encountered when he went there. The converts in Philippi Christianized these Roman military virtues. Paul loved the people there so much that he visited the city on all three of his apostolic journeys.
You can hear St. Paul using military language as he writes to the former Roman soldiers in Philippi who had become Christians.
*Only let your manner of life be worthy of the gospel of Christ, so that whether I come and see you or am absent, I may hear of you that you stand firm in one spirit, with one mind striving side by side for the faith of the gospel, and not frightened in anything by your opponents. This is a clear omen to them of their destruction, but of your salvation, and that from God. (Philippians 1:27-28)
Brethren, I do not consider that I have made it my own; but one thing I do, forgetting what lies behind and straining forward to what lies ahead, I press on toward the goal for the prize of the upward call of God in Christ Jesus. (Philippians 2:13-14)
that I may know him and the power of his resurrection, and may share his sufferings, becoming like him in his death, (Philippians 3:10) *
The honor of sharing in Christ’s death, straining forward toward the prize and pressing on toward the shared goal, not being afraid, power, strength, standing firm, unity of purpose, striving side by side and the destruction of adversaries - this is clear military language and the book becomes quite beautiful when read in that light.