What core changes did Gaius Marius introduce to the Roman army?

• A. He opened recruitment to landless citizens, professionalized the army, and reorganized units by cohort, enhancing soldier loyalty to commanders.
• B. He reduced the size of the army and required property qualification.
• C. He shifted loyalty to the Senate.
• D. He removed the military from political influence.

Answer: (A)

Marius's reforms changed who could join the army, how soldiers fought, and why they served. He opened recruitment to landless citizens, removing the property requirement that had limited who could enlist. This created a large, professional pool of soldiers whose livelihoods depended on regular pay and rewards from the state and their commander. He also reorganized the legions into cohorts of about 480 men, standardizing structure and training and making units more flexible and easier to command. With longer terms of service and steady pay, soldiers developed strong loyalty to the general who provided their pay, equipment, and promised rewards, rather than to the Senate or the republic as a whole. Together, these changes transformed the army into a professional force tied to its commander, which is why this option best captures what Marius did.