In autumn 1923, a German mark could buy less by the hour than it had bought that morning. The documentary path through that collapse sits under Weimar 1923 — dates, notes, and what failed.
The vocabulary page is separate. Inflation and purchasing power names what the unit still buys over time, without retelling Weimar hour by hour. Mixing the definition with the dated event makes both harder to follow.
This note only holds the door: history for what happened; Sound Money for the words. Neither page is a tip, a forecast, or a call to buy metal.