World Wars: Secrets and Spies, pages 84 & 85 Crossword

Knowledge is ___.
information such as shipbuilding, arms supplies, road maps, and train timetables that might be useful in a military campaign
At the onset of war, every ___ in Germany was taken prisoner.
All German and Austro-Hungarian in Britain was classed as ___ ___ (2 words).
Where enemy aliens were sent (2 words)
The British royal family changed their name to ___.
tattle tale behavior meant to help police find spies (2 words)
Reading ___ led to the arrest of several spies.
Spies could easily tap into ___ transmissions used to send telephone and telegram messages.
The British knew what the German navy was up to because they had found three of their ___.
Many spies were untrained ___.
Because she worked for both the Germans and the French, Margareta Zelle was a ___ ___ (2 words).