Final answer:
The Louisiana Territory originally belonged to Spain before being transferred to France, and eventually purchased by the United States in the Louisiana Purchase.
Step-by-step explanation:
The Louisiana Territory was originally under the control of Spain. However, in 1801, Spain ceded Louisiana (including New Orleans) to France. In 1802, the United States lost its right to deposit goods free in the port of New Orleans as a result of this transfer. This caused outrage and some called for war with France. Ultimately, the Louisiana Territory was purchased by the United States in 1803 in what is known as the Louisiana Purchase.