When the Civil War broke out, Blair tried to enlist in the Union military though was twice rejected due to being physically unfit.<ref name=britannicabio/> Ultimately accepted in 1862, he joined the 15th New Hampshire Volunteers and rose among ranks from [[Captain]] to Lieutenant Colonel. | When the Civil War broke out, Blair tried to enlist in the Union military though was twice rejected due to being physically unfit.<ref name=britannicabio/> Ultimately accepted in 1862, he joined the 15th New Hampshire Volunteers and rose among ranks from [[Captain]] to Lieutenant Colonel. |