Chicago headlined The Guess Who, a moderately popular Canadian rock band that spent time after an unsuccessful British tour doing Canadian television, and soft-rock duo Seals and Crofts. Singer's collage was an unsettling statement of patriotism superimposed on what could be seen as bird's-eye-view of Southeast Asia.
The 1st printing poster is identified by the presence of a red dot in the top white margin about 1/2" from the right hand corner. It measures 14" x 21 7/8" and was printed before the concert.
The 2nd printing omits the above-mentioned red dot and was printed after the concert. It measures 14" x 22".
During his Fillmore era, from 1969-1971, Singer created more posters for Graham than any other artist. Singer's posters are notable for his use of collage, incorporating thousands of images clipped from magazines spanning several decades. He developed a format that included a stunning variety of lettering styles, applying them in close relation to the theme or subject of a poster.