Chemin des Dames

I have many questions regarding Chemin des Dames; most of them deal with its memorialization over time.

1 - Was anything built on the site right after World War I?

2 - If not, was there anything there until the current museum, which opened in the last decade?

3 - What became of the site during World War II?

4 - What's the issue with the memorialization of the mutiny that took place there in 1917?

5 - What's the controversy regarding Senegalese troops and Chemin des Dames about?

6 - If there wasn't anything on the site until now, why was the museum randomly commissioned?
7 - What does reading the memorial's websites & publications tell us about the way that they want us to portray the conflict?
8 - How do two leading French newspapers, one conservative, and one liberal, agree and differ about the issue?