There are a number of ways you can locate bibliographies useful for your topic in OBO:
Choose a topic from the alphabetical list. These will generally be fairly broad, covering time periods (ex: American Colonial Wars), a single war (ex: Chinese Civil War), an individual (ex: Carl von Clausewitz) or even topics like Armored War.
Use the search box at the top of the page to search the full-text of all the bibliographies. Here are the results for a search on Eisenhower. There are tabs in the results list to move between full articles/bibliographies and single citations. Under the citations tab, the search results do not take you directly to that section of the bibliography/article, so note which section it occurs in so you can navigate to it easily.
Use the Advanced Search if you would like to be a bit more specific. Drop-down menus allow searching in places other than the full-text (article title, article author, citation title, citation author, or sub-heading) and you can also refine your results to only include certain content types.