prior to European colonization in Africa, slavery had already existed between the people there, slave owners would willingly offer their slaves to the Europeans in order to protect them selves, the europeans can argue that they did not establish slavery, rather, they continued work that seemed beneficial to them.
Creating a diary, include details about life in these internment camps. Remember that the Japanese were being targeted simply because of their race, as this was directly after the Pearl Harbor incident. Similar to Germany in WW2, although without the mass killing, they were stripped from their jobs and livelihood to be sent to these internment camps to prevent terroristic acts from the Japanese, which we know would never happen.