While you can't find a literal "map of annexation" of the Sudetenland, you can find maps depicting the transfer of territory from Czechoslovakia to Germany in 1938.

Here's what you need to know:

* The Munich Agreement: This agreement, signed in 1938, allowed Germany to annex the Sudetenland, a region in Czechoslovakia inhabited primarily by ethnic Germans.

* Maps: You can find maps showing the pre-1938 borders of Czechoslovakia and the new borders after the annexation. These maps would highlight the Sudetenland region and its transfer to Germany.

* Search terms: Search for "Map of Czechoslovakia 1938," "Map of Sudetenland annexation," or "Map of Munich Agreement" to find relevant maps online.

Important Note: The annexation of the Sudetenland is a complex and controversial historical event. It is crucial to consider the different perspectives and interpretations when studying this topic.