I made this template for a May Day march poster some years back for Vida Urbana in Boston and Chelsea, Massachusetts. Their marches were always huge and incredible on May Day!
A red and white line drawing showing a crowd of marching protestors from overhead. There are a multitude of different people: different races, young, old, able-bodied and disabled, one with a megaphone, and some with pots and pans they are banging. They hold banners that are blank so that anyone who downloads the image can place their own text inside the blank areas.