If you are looking for a particular tune, the best strategy is to use the Search Engine
Note that the music pages with an asterix have a control panel to play, loop, or downloade the music as you read the page. Right click on the ellipsis for a menu of the options.
Music pages wtihout an asterix will have a link to open the music in a separate window. You may play, loop, or download the music from that page.
Many of these tunes rightly belong in several categories. For instance, The Girl I Left Behind Me was popular on both American and British sides of the Revolutionary War, and has been sung in wars since. The World Turned Upside Down was, in fact, sung by the British, but I have included it in the Revolutionary War. And Lilli Burlero is originally English but is identified with marching men throughout the world. So I've put songs in more than one category. I could do so with more.
Napoleonic Wars
(Duplicates from other wars are put here to note they were also popular during the Napoleonic Wars - see Songs of the Sea for more shanties that were popular aboard ship in many eras)