3786
It was built by the US Army Corps of Engineers and was used by the United States Army Air Force Twelfth Air Force during the North African Campaign against the German Afrika Korps .
 United States Army Air Force Twelfth Air Force, Afrika Korps
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States Army Air Force Twelfth Air Force, Afrika Korps