Answer:
Methodist and Presbyterian missionaries established settlements
Lewis and Clark explored and mapped the interior.
John Jacob Astor made one of the first settlements.
Explanation:
The Oregon Territory was initially an extension of land owned by America until February 14th, 1859 when it was officially recognised as the State of Oregon and part of the Union.
Therefore, the three events that the United States used as a claim to the Oregon Territory are
Methodist and Presbyterian missionaries established settlements
Lewis and Clark explored and mapped the interior.
John Jacob Astor made one of the first settlements.
She was a woman and women were not seen as capable of doing such incredible things back then.
They feared that more populous states would have a sort of monopoly on elections and that it was best for all states to have the exact same powers as other, smaller states.
It created an orderly plain to settle a new area of the u.s, the territory grew in population and got rights for self government as well.
