foothold

(noun) an area in hostile territory that has been captured and is held awaiting further troops and supplies. Synonyms: bridgehead. Examples: "An attempt to secure a bridgehead behind enemy lines." "The only foothold left for british troops in europe was gibraltar."

(noun) a place providing support for the foot in standing or climbing. Synonyms: footing.

(noun) an initial accomplishment that opens the way for further developments. Synonyms: beachhead. Examples: "The town became a beachhead in the campaign to ban smoking outdoors." "They are presently attempting to gain a foothold in the russian market."