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A " military operation plan " ( also called a " war plan " before World War II ) is a formal plan for military armed forces , their military organizations and units to conduct operations , as drawn up by commanders within the combat operations process in achieving objectives before or during a conflict .
 World War II
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 World War II