Thanks. Looks to me as if it leaves plenty of wriggle room for isolationists.
AJP Taylor was probably right to describe it as "merely a promise to liberate France if she were conquered by the Germans, a promise fulfilled in 1944 even without a treaty".
Preventing a country from being conquered and liberating a country aren't completely the same thing. Indeed, I just wanted to point this out.
And here is no particular reason to expect them to be any less isolationist than OTL, assuming that Mr Harding's War is remembered as sourly as Mr Wilsons.
Would Harding have been as authoritarian at home as Wilson was in our TL during World War I, though? If not, you could possibly see public attitudes towards WWI be somewhat different in this TL (in the aftermath of WWI, that is).