Jesus speaks of warfare:
"Do not think that I came to cast peace on earth; I did not come to bring peace but a sword. For I came to set a man against his father, and a daughter against her mother, and a daughter-in-law against her mother-in-law; and a man's enemies will be members of his household. He who loves father or mother... son or daughter more than Me is not worthy of Me."
Isaiah speaks of Him as a warrior:
"And He will strike the earth with the rod of His mouth,
And with the breath of His lips He will slay the wicked."
And Jesus reveals Himself to John in the Book of the Revelation as a warrior standing in the midst of the 7 churches:
"...His eyes were like a flame of fire; and His feet were like burnished bronze... and out of His mouth came a sharp two-edged sword..."
To the church in Pergamum:
"Repent therefore; or else I am coming to you quickly and I will make war against them with the sword of My mouth."
And also as King of Kings, and Lord of Lords, waging war:
"And I saw heaven opened; and behold a white horse, and He who sat upon it is called Faithful and True; and in righteousness He judges and wages war. And His eyes are flames of fire, and upon His head are many diadems; and He has a name written upon Him which no one knows except Himself. And He is clothed with a robe dipped in blood; and His name is The Word of God.
And the armies which are in heaven, clothed in fine linen, white and clean, were following Him on white horses.
And from His mouth comes a sharp sword, so that with it He may smite the nations; and He will rule them with a rod of iron; and He treads the wine press of the wine of the fierce wrath of God, the Almighty. And on His robe and on His thigh He has a name written, King of Kings, and Lord of Lords...
And I saw the beast and the kings of the earth and their armies, assembled to make war against Him who sat upon the horse, and against His army..."