beach·head 
/ˈbi:tʃˌhɛd/ noun
plural beach·heads /ˈbi:tʃˌhɛd/ noun [count] : a beach on an enemy's shore that an invading army takes and controls in order to prepare for the arrival of more soldiers and supplies — often used figuratively to mean a place or position that serves as a base for future action or progress ▪ The company established a beachhead in New York City.
