You can borrow my planned slogan! 
Two-sider sign with one side standard “No Kings” etc. mottoes.
For the other side, I wanted to honor the fact that for a long time past the Army has been planning the original (and much less ostentatious) version of this Flag Day parade as a commemoration of its 250th year, before the orange baby inserted himself into the event:
"HAPPY 250TH, U.S. ARMY! 
DON’T YOU HATE WHEN THEY MAKE YOU “SHARE” YOUR BIRTHDAY PARTY WITH THE WHINY TODDLER?" 
A more artistically skilled friend is helping with the depiction of the orange baby. 