The Collaborative International Dictionary
Landsturm \Land"sturm`\, n. [G. See Land; Storm.] [In Germany and other European nations, and Japan:]
A general levy in time of war.
The forces called out on such levy, composed of all men liable to service who are not in the army, navy, or Landwehr; the last line of defense, supposed to be called out only in case of invasion or other grave emergency. See Army organization, above.
Wikipedia
In German-speaking countries, the term Landsturm was historically used to refer to militia or military units composed of troops of inferior quality. It is particularly associated with Prussia, Germany, Austria-Hungary, Sweden and the Netherlands.
Usage examples of "landsturm".
Before we left Lierre, nine troopers of the Landsturm were marched into the hallway of the Hotel de Ville, to be examined by the officer who is there for that purpose.