How did america turn the idea of manifest destiny into a reality ? ( what did america do to get all land of the united states) ?

If you meant that question literally then the answer is the America got all his land mostly by the battle of independence from Great Britain in which it got all the territory that the british took or claim after the french-indian war in which france and the british sign a treaty which stated that all territory gain from battle most be return. In which the british later =send a huge debt to the 13 colonies that stated that they most pay for all the damage done thanks to the french and indian war 

Its is d. because i did it