beachhead

noun

1
an initial accomplishment that opens the way for further developments
the town became a beachhead in the campaign to ban smoking outdoors
they are presently attempting to gain a foothold in the Russian market
2
a bridgehead on the enemy's shoreline seized by an amphibious operation
the Germans were desperately trying to contain the Anzio beachhead

Also useful for “beachhead”:Unscrambler— Rearrange the letters in “beachhead”