... Lieutenant of the Sixth regiment of infantry, then regarded as the crack regiment of the army, under the command of Brigadier General Henry Atkinson. He reported for duty on the first of June. Lieutenant Johnston 's first military service was performed in the expedition sent from Prairie-du-Chien, on the 29th of August, to compel the Winnebagoes to make reparation for outrages committed on the whites. He c...