Why did the USA steal the lands of Mexico but not of Canada..

 The phrasing of "stealing lands" can be contentious and overly simplistic when discussing historical events like territorial expansion. However, let's examine the acquisition of land by the United States from Mexico and Canada:

1. Mexico: The United States acquired vast territories from Mexico through the Treaty of Guadalupe Hidalgo in 1848, following the Mexican-American War (1846-1848). The war was sparked by disputes over the Texas-Mexico border, with the United States annexing Texas in 1845. The conflict escalated, leading to the U.S. military occupation of Mexico City. The Treaty of Guadalupe Hidalgo ended the war and ceded territories that now comprise present-day California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado and Wyoming to the United States. This acquisition significantly expanded U.S. territory.

2. Canada: Unlike Mexico, Canada remained under British control throughout much of the 19th century. While the United States had territorial disputes with Britain, such as the Oregon boundary dispute in the Pacific Northwest, these conflicts were resolved peacefully through diplomacy and treaties. The Oregon Treaty of 1846 established the 49th parallel as the border between British North America (Canada) and the United States west of the Rocky Mountains. Similarly, the Webster-Ashburton Treaty of 1842 settled border disputes in the Northeastern United States and Canada. Additionally, Canada did not face the same internal turmoil and military conflict as Mexico did during the 19th century, which contributed to a more stable relationship with the United States.

Several factors contributed to the different outcomes regarding territorial acquisition from Mexico and Canada:

1. Geopolitical Dynamics: Mexico was a weaker nation compared to the United States, both militarily and economically. The expansionist sentiment in the United States, combined with Manifest Destiny ideology, fueled territorial ambitions.

2. Military Conflict: The Mexican-American War resulted in decisive U.S. victories, leading to the signing of the Treaty of Guadalupe Hidalgo, which favored the United States.

3. British Influence: Canada remained under British control until it achieved gradual independence through diplomatic means. British authority in Canada served as a deterrent to U.S. expansionist ambitions in that direction.

4. Diplomacy and Treaties: Disputes between the United States and Canada were often resolved through negotiation and treaties rather than military conflict. This contributed to a more stable relationship between the two nations.

In summary, while the United States expanded its territory through various means during the 19th century, including military conquest, diplomatic negotiations, and treaties, the circumstances and dynamics differed significantly between Mexico and Canada, leading to distinct outcomes in territorial acquisition.