Sea Breeze my views about the subject of whether the Bible teaches that Christians must not kill humans (including in wars between nations), as stated in my previous posts, were greatly the result of the WT's teachings on the topic. Furthermore the primary scriptural verse which I based my view upon was Matthew 26:52. But a post of yours in this topic thread did get me thinking about whether
there are any biblical verses which indicate that Christians should
never take up the sword (or use deadly force) against another human. As a result I researched the matter in other commentaries (and in annotations of other study Bibles) than the ones I quoted from in this topic thread. As result of such research I now think that Matthew 26:52 does not indicate that Christians should refrain from being in a police force or even in a military. Also a number of verses referred to by you and others in this topic thread are ones which I am aware of as being problematic for the idea that Christians must not be in a military. Furthermore, some other verses were mentioned in this topic thread which I likely had not thought of before in regards to whether Christians, according to words attributed to Jesus Christ, can be in a military.
It now seems to me that Matthew 26:52 is speaking of those who use deadly force against humans in unlawful ways (ways which violate the laws of human governments), including (but not likely exclusively) against police officers and established governmental military personnel of one's own community (or nation).
However, there are statements in the Bible attributed to Jesus Christ which strongly encourage the followers of Jesus Christ to be nonviolent in regards to fellow humans. These statements include ones about the meek and peacemakers being happy/blessed and becoming called sons/children of God as result and inheriting the the Earth and the kingdom of/from heaven (and of God) (see Matthew 5:5-12), loving one's enemies (and even praying for them) and about turning the other cheek (see Matthew 5:43-48 and Luke 6:27-36), and about loving one's brother.