Eagle (standard of legion) and insignia of maniples.

By the image on a medal.
Credits:
Picture, text: Pis’ma Marka Tulliya Tsitserona k Attiku, blizkim, bratu Kvintu, M. Brutu. t. III, gody 46—43. Izdatel’stvo Akademii Nauk SSSR, Moskva—Leningrad, 1951, s. 641.
RUSSIAN

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THE DATABASE OF ANCIENT ART
Keywords: eagle standard of legion and insignia of maniples aquila badge of manipulus signum
HISTORY OF ANCIENT ROME