Which imperial power had the most colonies spread out across the world in 1900? great britain france russia germany united states

Ineed answers 5 and 6 on my social studies homework reply to this question i posted

All of the following are reasons that rome was so strong and powerful except a. rome had excellent soldiers c. they were armed with a gladius and pilum b. they had legions d. they valued education and intellect

America withdrew from vietnam because of military failure