This document outlines the key aspects of historical research. It defines historical research as the systematic collection of data to describe, explain and understand past events without manipulation of variables. The purposes of historical research include learning from past successes and failures, seeing if past approaches could apply to current problems, assisting in prediction, and testing hypotheses. The steps involve defining the problem, locating relevant historical sources like documents and oral statements, summarizing and evaluating these sources, and presenting interpretations of the information. Primary sources are created by direct witnesses, while secondary sources describe events through others. Historical research allows investigating unique topics but comes with difficulties controlling for threats to validity.