Because many Romans refused to fight in the war Foreign mercenaries also provided Rome with more manpower. The Roman empire was huge and there simply were not enough Italian soldiers to fill the ranks of the legions. In addition, the foreign troops could aid the Roman forces as many of them were expert in certain specialty types of warfare such as bowmen and slingers. hope this helps
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They wanted to make sure that they did not waste ammo and they did not shoot anyone wrong.
The first step historians take as part of the historical thinking process is to pose the historical question and establish relevant background about the topic. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
The strategy of the Civil War for the Confederacy (the South) was to outlast the political will of the United States (the North) to continue the fighting the war by demonstrating that the war would be long and costly.