The Library of Congress housed hundreds of countless maps covering a big variety of subjects from maps used by fire insurance provider to population density to
maps of military battles and campaigns..

The LOCs collection of maps of military fights and projects consists of more than 4,000 maps that are totally free to view, download, and reuse. The large majority of the maps are from the 18th and 19th centuries although there are about 600 maps covering World War I and II..
You can browse through the collection according to date, topic, place, and language (most of the maps are in English or French). Click on it to see more info about the cartographer and a little backstory on the map as soon as youve found a map that appears interesting. Most of the maps can be downloaded as images and some can be downloaded as PDFs..
Applications for Education.
When looking through the collection was to download the maps to use as overlays in Google Earth, my first thought. Doing so can supply students with some geographic context and comparisons for military fights and projects that theyre discovering about in U.S. History classes. Instructions for overlaying historical maps onto Google Earth can be found.
in this video.