Continuing the thread about geography, and more particularly geography and politics, there is a great link for you to explore
here. It's the Department of History at the United States Military Academy, and they have done a great service in putting hundreds of maps online, a lot of them dealing(for some strange reason)with this country's wars, but many of them historical, e.g. Europe in l922. On the table of contents, look for the section "Our Atlases" and click.
I've already used the site many times, and I never even had to stand at attention. Go Army!!