Meaning : An area in hostile territory that has been captured and is held awaiting further troops and supplies.
Example :
An attempt to secure a bridgehead behind enemy lines.
The only foothold left for British troops in Europe was Gibraltar.
Synonyms : bridgehead
Meaning : A place providing support for the foot in standing or climbing.
Synonyms : footing
Meaning : An initial accomplishment that opens the way for further developments.
Example :
The town became a beachhead in the campaign to ban smoking outdoors.
They are presently attempting to gain a foothold in the Russian market.
Synonyms : beachhead