His volunteer work in the hospital 'led' him 'to' a career in nursing. = His volunteer work in the hospital 'led' [='inspired'] him 'to become' a nurse.
We've been 'led to believe' that the labels on food items disclose all ingredients, but it's becoming clear that this is not the case.
His volunteer work in the hospital 'led to' a career in nursing. = His volunteer work in the hospital 'led to' him becoming a nurse.
(..) with a very large radar signature... ...closing in on our position. Losenko? We have destroyed ourselves. Skynet tracked our signal. We led them straight to us. Our best machines had failed time and again to complete a mission. Something was missing. We had to think. Radically. (..)2009 Terminator Salvation