The Ming voyages associated with Zheng He took place between 1405 and 1433.
What the source supports#
Columbia describes seven expeditions. A broad period for the series is different from the departure and return dates of an individual voyage.
Evaluating the evidence#
For a route comparison, list one voyage at a time and identify the evidence for each port. Distinguish a contemporary place name from a modern country. A map line is a reconstruction, not proof of an uninterrupted exact track or a guarantee of a later political relationship.
Scope#
These questions are editorial suggestions. This short introduction does not invent a historical scene or claim to settle a disputed interpretation.