Everyone knew war was coming prior to WW1, they just weren’t anyway certain where, when or why.
World War 2, it was immediately obvious for over a decade prior to the US’ entry into the war.
“World War 2, it was immediately obvious for over a decade prior to the US’ entry into the war.”
For those who were not blind to the truth. The reality was that our military still had horses, wagons and biplanes.