The German occupation/Re-militarization of the Rhineland

Picked one by one from a mixed channel. Transcript check: Historical lecture-style explanation of the background and events leading to the remilitarization of the Rhineland.. Channel rule: Include narrated explainers of real historical events, conflicts and places, plus archival instructional/training films. Exclude 'What if' alternate-history videos, sleep/compilation uploads, and anything with a hype-hook title.