Detachment
“In Jugurtha’s case, previous service with the army of Scipio Aemilianus in Spain, as the commander of an allied detachment of Numidian archers, gave him useful experience of Roman military tactics and useful connections on the Roman side.”

Confused by " an allied detachment of NUmidian archers" notable by "detachment" in this context. Only ascribe the "not involvement, unrelated" defiontion/

Question

Detachment
“In Jugurtha’s case, previous service with the army of Scipio Aemilianus in Spain, as the commander of an allied detachment of Numidian archers, gave him useful experience of Roman military tactics and useful connections on the Roman side.”

Confused by " an allied detachment of NUmidian archers" notable by "detachment" in this context. Only  ascribe the "not involvement, unrelated" defiontion/

Answer

detachment in a military context refers to a small group sent on a mission

Hope this helps you. Not sure exactly what you were asking.