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.
(..) where they worshipped the triangle for its ability to control time. It gave its possessor a power that could be used for good or great evil. Their abuse of this power led to the destruction of the city. To be sure no man would ever again wield this power, the triangle was split into two pieces (..)2001 Lara Croft: Tomb Raider