The WTS assumes that Cornelius left the military after being baptized!!!
*** w74 6/1 pp. 342-343 What Prevents You from Getting Baptized? ***Even as the Gentile army officer Cornelius accepted Christianity and was baptized in the first century, so in this twentieth century a number of men of the military resigned from the armed forces so as to be able to get baptized, in keeping with Isaiah 2:4. One of these was a master sergeant who had only four more months of service before he could retire on a fine pension, another soldier after having served seventeen years, and another after having served twenty years resigned and was baptized.
*** w86 9/1 p. 19 par. 11 Christian Neutrals in a Bloodstained World ***Some may ask, ‘What of Cornelius, the centurion, and Sergius Paulus, the army-backed proconsul in Cyprus? Were not these men associated with the military?’ Yes, at the time they accepted the Christian message. The Scriptures, though, do not tell us what Cornelius and others did after their conversion. No doubt Sergius Paulus, who was an intelligent man and "astounded at the teaching of Jehovah," would soon scrutinize his secular position in the light of his newfound faith and make a proper decision. Cornelius would have done likewise. (Acts 10:1, 2, 44-48; 13:7, 12) There is no record that the disciples told them what action they must take. They could see that from their own study of God’s Word.—Isaiah 2:2-4; Micah 4:3.
But then from the other side of their mouth the WTS says:
*** w57 12/15 p. 756 pars. 28-29 Deliverance for Integrity Toward God ***What the centurion Cornelius did after that, whether he resigned from military service as a Roman centurion or not, the book of Acts of the Apostles does not state.
Unquestionably, under the operation of God’s holy spirit Cornelius applied to his personal affairs and relationships the principles of Christianity which he discussed with Peter "for some days" after that. Cornelius was not a circumcised Jew, and, as a Roman centurion, he was not fighting theocratic warfare as Joshua the son of Nun and David the slayer of the giant Goliath did many centuries before that. (Josh. 10:1-11:23; 1 Sam. 17:4-54; 2 Sam. 8:6-14)
Had Peter told Cornelius to resign, Peter might have been accused of obstructing the military program of the sixth head of the "wild beast," and might have been executed for that action instead of for preaching God’s message without compromise or letup. Likewise, if God’s written Word, particularly the so-called New Testament written by Christians under inspiration, had directly told dedicated Christians just what they should do when faced with the call to military service for the sixth and seventh heads of the symbolic wild beast, The Holy Bible would, without doubt, have been forbidden or proscribed in every land under the control of the "wild beast," particularly for its instructions on the military question.