Is it true that the idea of manifest destiny is that Americans are to own land all the way to the Pacific ocean

Yes, the idea of manifest destiny was a belief that it was the destiny of Americans to expand their territory all the way to the Pacific Ocean. This belief was a driving force behind the westward expansion of the United States in the early to mid-19th century. The concept of manifest destiny was used to justify the annexation of territories such as Texas, Oregon, and California, and the acquisition of land through treaties, purchases, and wars. The goal was to establish a nation that stretched from coast to coast, and this idea played a significant role in shaping American foreign policy and attitudes towards the indigenous peoples and nations that inhabited these territories.