265314
After a transfer to the Armor branch , he held a variety of positions in the 1st Battalion , 210th Armor , including command positions in three companies while completing the Armor Officer Advanced Course .
 1st Battalion
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 1st Battalion