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In page Second Battle of Bull Run:

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That evening, Pope wired Halleck with a report of the day's fighting, describing it as "severe" and estimating his losses at 7000–8000 men. He estimated Confederate losses at twice this many, an extremely incorrect estimation given that Jackson had been fighting a mostly defensive battle. Although Confederate casualties were lower, their officer losses had been high; aside from the loss of two division commanders on August 28, three brigade commanders, Trimble, Field, and Col. Henry Forno, had been wounded. For comparison, only one Union brigade commander had been wounded so far, Col. Daniel Leasure, and no general officers.[citation needed]