Answer:
the use of vagrancy laws to imprison large numbers of freedmen
Explanation:
The use of vagrancy laws to imprison large numbers of freedmen enabled Bourbon-era leaders to establish the convict labor system.
This is because, with the convict labor system, prisoners were used to perform manual labor that brought good profit to the masters.
There are several primary sources that you might use, here are a few examples:
A diary written by a soldier during a battle.
Medical records of war doctors from the battle.
newspaper clippings about the battle (and published at the time of the battle).
Speeches of famous generals from the battle.
