Leslie Groves was commissioned in the U.S. Army Corps.
As of 2014, the active field corps in the US Army are I Corps ("eye core"), III Corps and XVIII Airborne Corps; their lineages derive from three of the corps formed during World War I (I and III Corps) and World War II (XVIII Airborne Corps)
 During World War I and World War II, due to the large scale of combat, multiple corps were combined into armies which then formed into army groups

