What is the fine-grained topic of the following text: I have already spoken of the gallant conduct of the Seventy-sixth Ohio and its colonel, of the Third Missouri and its colonel, who captured two stand of rebel colors, and of the good service done by the Seventeenth Missouri, under Colonel Hassendeubel, and I will now add that Colonel Stone, of the Twenty-fifth Iowa, and the majority of his regiment acted like veterans; but the cowardly conduct of his major in leaving the field in the face of the enemy, thereby giving countenance to straggling and skulking, cannot be too severely censured. Only return the topic.
Performance and conduct of different regiments and their leaders during a battle.