Iwo Jima Smoke and Dust - Targeting Marines

When Marines fired their rockets, during the Battle of Iwo Jima, they gave away their positions to defending Japanese soldiers:

The positions from which rocket troops launched salvos of 4.5-inch rockets became very unhealthy places, indeed, as Japanese artillery and mortars zeroed in on the clouds of smoke and dust resulting from the firing of the rockets.

Credits

USMC photo 111100, featured in Closing In:  Marines in the Seizure of Iwo Jima, by Col. Joseph H. Alexander, U.S. Marine Corps (Retired), at page 42.  Part of the Marines in World War II Commemorative Series.