Louis Armstrong rose from a childhood of extreme poverty in New Orleans to become one of the most influential musicians in American history. Along the way, his life was shaped by unlikely mentors, personal sacrifice and moments that forever changed the sound of jazz. A pioneering soloist and virtuoso trumpeter with a distinctive gravelly voice, Armstrong, later nicknamed "Satchmo" (for "Satchel Mouth," a reference to his wide-mouthed grin), helped transform jazz from a collective ensemble style into a solo-driven art form and set the standard for generations of musicians who followed. These nine lesser-known facts reveal how his journey offstage was every bit as dramatic, surprising and consequential as his legendary music.