What does the prefix a milli mean

Ineed with what i should write for my research paper. my topic is history of slavery. 1800 words. all i need is what to write in each paragraphs. like when the research paper has titles for each paragraph and it explains the tile in each paragraph. for example when did slaverh begin? why did it begin like an outline.

In what ways did the byzantines influence the developmental russian society?

Which piece of legislation granted african americans the right to vote