It was more complicated than that: the FDR administration did have the US find loopholes in the Neutrality Laws enacted by Congress forbidding intervention in Europe like selling old warships to Britain, then moved to Lend-Lease, then creating a naval security zone to protect British merchant shopping from U-Boats. All the while, it created a situation where Hitler took a gamble to take advantage of Japan attacking US to declare war on the US to allow his navy to shoot first.
I always thought this one of the funniest strips: just seeing Lucy getting sprayed by Woodstock wearing a helmet riding Snoopy as a helicopter is priceless.
In a later story, Jeff accompanies Duke in a field mission where he successfully completes an arrangement and Jeff fires into the air in celebration and draws a deadly attack that they barely escape from. After that, Duke states in no uncertain terms that he wants that moron gone.
Serves her right for being so cruel and cowardly not to dump him personally.