joie: kenneth c.is wrote the "don't know much about" series, although he actually knows a lot about history. his latest book is "more deadly than war" about the 1918 flu and its connections to combat. what was america like in 1918? kenneth: the united states had stayed out of the fight for three years. but in april, 1917, decided to declare war on germany. we had almost no army at the time, very small navy. so everything had to be started from scratch. joie: the build-up took about a year. and america's young soldiers were finally ready at the very moment, spring 1918, when another enemy arrived: the suddenly, it struck without warning, and it was like nothing that anyone had ever seen before. it was killing healthy young farm boys at a remarkable rate. they were turning blue, literally dying within hours, -- hours. joie: but america was focused on getting the dough boys to europe, with predictable consequences. kenneth: those troop transports were disease carriers. they were, like, hotbeds of infecti