the progressive era: crash course us history #27 Published 10 years ago • 4M plays • Length 15:01 Download video MP4 Download video MP3 Similar videos 15:07 progressive presidents: crash course us history #29 11:39 the persians & greeks: crash course world history #5 28:36 the vietnam war explained in 25 minutes | vietnam war documentary 11:55 ancient egypt: crash course world history #4 13:51 gilded age politics: crash course us history #26