XVIII Corps - Union Army - was created in 1862.
XVIII Corps - German Empire - was created in 1899.
V Army Corps - Germany - was created in 1934.
IX Army Corps - Germany - was created in 1934.
XX Army Corps - Germany - was created in 1940.
Kain XVIII was created in 1963.
Treehouse of Horror XVIII was created on 2007-11-04.
Corps à corps was created in 2003.
V Army Corps - Germany - ended in 1945.
III Army Corps - Germany - ended in 1945.
IX Army Corps - Germany - ended in 1945.
Mercy Corps was created in 1979.