Short answers, pulled from the story.
German troops destroyed 112 mineshafts and flooded or blocked over 1,000 miles of mine galleries with water and debris. They also demolished more than 300,000 houses and stripped factories of their machinery across occupied territory.
The Paris Peace Conference opened on the 18th of January 1919 with the goal of establishing lasting peace between Allied and Central Powers. Article 231 served as the legal foundation for reparations by stating that Germany accepted responsibility for all loss and damage caused by the war.
The London Schedule of Payments established on the 5th of May 1921 set the total liability of all Central Powers combined at 132 billion gold marks. This figure represented a compromise between higher demands from France and Italy versus lower figures supported by Britain.
On the 9th of January 1923 the Reparation Commission declared Germany defaulted on coal deliveries and voted to occupy the Ruhr region to enforce reparation commitments. French Premier Raymond Poincaré ordered troops into the area despite being deeply reluctant about taking such drastic action.
The Young Plan established on the 16th of September 1928 set theoretical final reparations at 112 billion gold marks with completion scheduled by 1988. The plan required Anglo-French withdrawal from the Rhineland within months while ending foreign oversight of German finances entirely.