4. what was an important consequence of the u.s. - mexican war?
5. who was john c. calhoun and what were his views on states
rights?
6. how was the territory of oregon resolved?
7. what country was the territory of oregon with?

4. The war—in which U.S. forces were consistently victorious—resulted in the United States' acquisition of more than 500,000 square miles (1,300,000 square km) of Mexican territory extending westward from the Rio Grande to the Pacific Ocean.

5. Calhoun championed states' rights and slavery and was a symbol of the Old South. He spent the last 20 years of his life in the U.S. Senate working to unite the South against the abolitionist attack on slavery. His efforts included opposing the admittance of Oregon and California to the Union as free states.

6. The United States and Great Britain signed the Treaty of Oregon on June 15, 1846, ending 28 years of joint occupancy of the Pacific Northwest. The treaty established the 49th parallel as the border between the two countries.

7. In 1846 the Oregon Treaty was signed between the US and Britain to settle the boundary dispute. The British gained the land north of the 49th parallel, including the Vancouver Island and the United States received the territory south of the parallel.

Explanation:

Unclear question, however I infer that the subject matter relates to government subject.

Explanation:

Some of the  interesting topics I will eagerly like to learn about includes;

Of all this topics I anticipate that the various power structures will be the most challenging one.