What unit from the Roman Army consisting of centuries enjoyed more prestige than the Roman navy?
Roman navy The Roman navy (Latin: "Classis" , lit. "fleet") comprised the naval forces of the Ancient Roman state. The navy was instrumental in the Roman conquest of the Mediterranean basin, but it never enjoyed the prestige of the Roman legions. Throughout their history, the Romans remained a primarily land-based people and relied partially on their more nautically inclined subjects, such as the Greeks and the Egyptians, to build their ships. Because of that, the navy was never completely embraced by the Roman state, and deemed somewhat "un-Roman".
Cohors I Ulpia Dacorum Cohors prima Ulpia Dacorum ("1st Ulpian cohort of Dacians") was an infantry regiment of the Auxilia corps of the Imperial Roman army. It was founded by the Roman emperor Trajan (r. 98-117), probably in preparation for his planned war against Parthia (113-6). The regiment's honorific title "Ulpia" refers to the emperor's "gens", or clan-name (Marcus Ulpius Traianus).