I think my mom coslept for a month or two, then moved me to a crib. idk about cry it out though. I think she's said I was a high needs baby and refused to sleep anywhere but her chest for awhile. My dad was a bit short tempered and didnt put up with crying so I imagine there was some pressure to keep babies quiet at night! So, there might have been some cio but i highly doubt there was full on sleep training.
My mom bfed all 5 of us, 6 months, 2.5 years, 2.5 years, 13 months, 17 months. I'm the youngest. Some time after dd was born, something clicked and I put 2 and 2 together.. one being that I knew the lengths my mom bfed all us kids, and the other being that she was paralyzed from guillian-barre syndrome when her 2nd baby was born. And I realized.. how on earth did you bf that baby for 2.5 years when you were PARALYZED in the 70s where support was minimal and bf was so uncommon?! So I asked! :D and this is, seriously, my favorite quote of my mom: "Breastfeeding? psh, that was EASY. I *had* to breastfeed, I couldn't hold a bottle!" Then demonstrated how her wrist was limp and she couldnt grasp anything, but she could move her whole arm from her shoulder.