In what ways in the 1920's did France seek to prevent the resurgence of Germany?

In addition, the French kept the Rhineland under military
occupation for part of the decade, which is the frontier/border region between the two
countries.  Even later in the decade when the French withdrew, they required that Germany keep
the Rhineland demilitarized.

They also spent huge sums of
money--$200 million at tne time, billions in today's dollars--constructing an elaborate defensive
line of fortifications, bunkers, gun emplacements and tank traps called the Maginot Line, which
covered the entire German-French border (just not the border with Luxembourg and Belgium, which
would later prove to be fatal).  They also maintained a very large standing army hoping this
would be a deterrent to any kind of German aggression in the future.  It also led to their
overconfidence, believing no German attack could be successful.  They didn't count on the
Blitzkrieg.