286762
In the face of the foreign troops quartered in East Frisia during the Thirty Years ' War , he was rather passive and let his chancellors Wiarda and Bobart manage the country .
 Frisia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Frisia