Operation Clarion attacked 200 German communication network targets to open a military campaign. This campaign was later than the Lorraine Campaign.
During World War II, Operation Grenade was the crossing of the Roer (Rur) river between Roermond and Dren by the U.S. Ninth Army, commanded by Lieutenant General William Hood Simpson, in February 1945. 
Lorraine Campaign is a term used by U.S. Army historians to describe operations of the U.S. Third Army in Lorraine during World War II from September 1 through December 18, 1944. 
Operation Clarion was the extensive Allied campaign of Strategic bombing during World War II which attacked 200 German communication network targets to open Operation Veritable/Grenade. 
