There are at least nine artists with this name:
These are photos from concerts where War played, so they may be of other bands that played the concert as well.
Three Dog Night / War / ZZ Top / Electric Light Orchestra (ELO) / Blue Öyster Cult / Hans Olsen Nov 18, 1973 Tempe, Arizona, United States Uploaded by Zimtrim
War / Aerosmith Nov 12, 1973 Portland, Oregon, United States Uploaded by Dt Rocks
War / Bob Marley & The Wailers / Ballin' Jack Nov 5, 1973 Philadelphia, Pennsylvania, United States Uploaded by Zimtrim
War / The Chambers Brothers / Tower Of Power Jan 20, 1973 Philadelphia, Pennsylvania, United States Uploaded by Zimtrim
REO Speedwagon / War Jan 14, 1973 Normal, Illinois, United States Uploaded by Zimtrim
