Rome faced constant attack after the Pax Romana because its army O was becoming less loyal to the emperor.
O was becoming more loyal to the emperor.
O had trouble paying mercenaries to fight.
O had trouble finding mercenaries to fight.
M

What was the purpose of the u.s navy's convoy system

What mountains did the first transcontinental railroad cross

Which of these would be most useful in studying the effect of germs exchanged between the new and old worlds? a. a graph showing the number of europeans between 1492 and 1600. b. a graph showing the number of native americans between 1492 and 1600. c. a primary source description of the symptoms of an unknown disease affecting native americans in 1492. o d. a primary source description of the symptoms of an unknown disease affecting europeans in 1492.