I believe that the part that uses the satirical tone is the part that criticizes old, sickly people. Hope this helps!<span />
The lines are “Once in khaki suits, gee we looked swell, Full of that Yankee Doodle-de-dum” This song was popular during the great depression were America was going through difficult economic times and there were joblessness, homelessness, starvation, and a loss of morale nationwide