In order to commemorate the Battle of Kings Mountain, which was fought on the 7th day of October 1780, the Kings Mountain battle ground, in the State of South Carolina, including such adjacent and contiguous lands as may be useful and proper in effectually carrying out the purpose of sections 430, 430a, and 430b to 430e of this title, is declared to be a national military park, to be known as the Kings Mountain National Military Park, when such land including said battle ground, shall become the property of the United States.