5461
This was a major engagement of the American Civil War , and between December 31 and January 2 , 1863 , the rival armies suffered a combined total of 23,515 casualties .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None