List four of the initiatives France made during the interwar period to safe guard itself against future German aggression.
One thing that the French did to try to make themselves safe from another attack by Germany was to build the Maginot Line. This was a line of defensive fortifications that were meant to prevent Germany from being able to invade France.
Another thing they did was to become part of the League of Nations. This was supposed to provide collective security -- it would help to defend France if Germany invaded again.
A third thing that they did was to sign the Kellogg-Briand Pact that was meant to outlaw war.
Finally, they forced Germany to demilitarize the Rhineland. This meant German forces would have a harder time invading because they would have to cross the Rhine river to invade France.
Another thing that France participated in was associated with the Locarno Pacts. There were several agreements that were made but they included a promise from Germany to respect Belgium's borders (never to cross them which they did when the eventually invaded France).
France and Czechoslovakia also agreed to help each other if Germany should ever threated that country. Such an alliance might cause Germany to hesitate to attack either country in the future, or so it was thought.
For more detail, look up the Locarno Pact.