This is the 10201st most frequent Russian word.
битву
"Битву" (битва) - "battle" or "fight."
In this sentence, 'битвы' is used in the genitive singular form to describe the setting of historical events.
В книге описаны героические подвиги во время битвы.
The book describes heroic feats during the battle.
Here, 'битву' is in the accusative singular form, acting as the direct object of the verb 'избегал'.
Он никогда не избегал битву, если нужно было защитить родных.
He would never avoid a battle if it was necessary to protect loved ones.
In this example, 'битву' again appears in the accusative singular form, indicating the goal of the discussed strategy.