There is a difference between a warrior and a soldier.
“The shift to a professional military has always been understood to have involved risks – the classic(al) example of those risks being the Roman one: the creation of a semi-professional (I tend to think that the Roman army before Augustus is only truly semi-professional; the true professional Roman army only comes with the creation of permanent standing legions and fixed service lengths) Roman army misaligned the interests of the volunteer soldiers with the voting citizens, resulting in the end (though a complicated process) in the collapse of the Republic and the formation of the Empire in what might well be termed a shift to ‘military rule’ as the chief commander of the republic (first Julius Caesar, then Octavian) seized power from the apparatus of civilian government (the senate and citizen assemblies).”
https://acoup.blog/2021/01/29/collections-the-universal-warrior-part-i-soldiers-warriors-and/