all citizens in the roman republic had to serve in the military during wars. what was one effect of their military service in the last years of the republic? citizen farmers could not look after their farms and lost their land and livelihood after returning from war. citizen farmers used the money they earned through military service to buy land and improve their farms. citizen farmers felt more loyal to the roman republic after serving in the military during wars. citizen farmers involved in military service supported the senate more than other plebeians did. citizen farmers who fought in foreign territories remained there and became landowners after roman victories.