In the summer of 1918, as the Great War raged and American doughboys fell on Europe’s killing fields, the City of Brotherly Love organized a grand spectacle. To bolster morale and support the war effort, a procession for the ages brought together marching bands, Boy Scouts, women’s auxiliaries, and uniformed troops to promote Liberty Loans –government bonds issued to pay for the war. The day would be capped off with a concert led by the “March King” himself –John Philip Sousa.

Within 72 hours of the parade, every bed in Philadelphia’s 31 hospitals was filled. In the week ending October 5, some 2,600 people in Philadelphia had died from the flu or its complications. A week later, that number rose to more than 4,500. With many of the city’s health professionals pressed into military service, Philadelphia was unprepared for this deluge of death.
https://www.smithsonianmag.com/histo...flu-180970372/