The plane had engine problems and had to make a 'forced' landing in a field. [=the plane was forced to land in a field]
The pilot was 'forced to land' when one of the plane's engines caught fire.
He was 'forced' to resign from office. = He was 'forced' out of office.
(..) Do you know who Marsellus Wallace is? Yeah. If she croaks on me, I'm a fucking grease spot! I will be forced to tell him that you did not help... and that you let her die on your fuckin' lawn. Now, come on, help me. Help me. Pick her up. (..)1994 Pulp Fiction