Why are primary sources valuable to historians? They provide a thorough analysis of an event’s impact on history.
They provide insight into the thoughts and feelings of a participant in history.
They compare and contrast different perspectives on an event or time period.
They evaluate how an event is viewed after a long period of time.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

answer; /// i do believe that its napolean's conquest of spain;

well first we can compare on what the slave masters ate and what the slaves ate well the masters ate fancy great food like chicken rice mash potatose and stuff like that and slaves ate well food that your not suppost to eat like the weird parts of turkey and chicken and slaves master chilled beat and eat and slaves work get beat and get little of sleep there you go