The second part of the assignment is a short summary of your paper. You can include the overall thesis if you know what that will be, or even an outline. The more you give me here the better off you will be on your final paper.
Remember that research papers at this level are not a retelling of historical events. They MUST be argumentative in scope. You must present an arguable point and then defend it with your sources you have. Think along the lines of a debate. Present your theory, then defend it. If you spend too much time (or the majority of your paper) retelling what happened and not proving your point, your grade will suffer. Ideally in a history paper. no more than two paragraphs (generally located right after the introduction and thesis) should be used for historical context.