How do social scientist interpret the past

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.

Which of these events was a severe setback for the u.s. war effort in the pacific?

This amendment made cuba an american protectorate and forced cuba to cede guantanamo bay to the u.s.