British historian C. J. Cadoux summarized the uncompromising position of the early Christians very well in his book, The Early Christian Attitude on War, on pages 245 and 246:
“The early Christians took Jesus at his word, and understood his inculcations of gentleness and non-resistance in their literal sense. They closely identified their religion with peace; they strongly condemned war for the bloodshed which it involved; they appropriated to themselves the Old Testament prophecy which foretold the transformation of the weapons of war into the implements of agriculture [Isa. 2:4] . . . With one or two possible exceptions no soldier joined the Church and remained a soldier until the time of Marcus Aurelius (161-180 A.D.). Even then, refusal to serve was known to be the normal policy of the Christians—as the reproaches of Celsus (177-180 A.D.) testify. . . . The application of Jesus’ teaching to the question of military service was in a way unmistakable.”
The Watchtower Announcing Jehovah’s Kingdom. October 1, 1966 p. 590