Siberian tiger / Amur tiger (Panthera tigris altaica) 1  The Siberian tiger is the largest living representative of felids, and one of the largest felids that have ever lived. 2  It is usually taller than the Bengal tiger by 5-10 cm (2-4 in). 3  Stripes on fur are unique for each individual, they play the same role as fingerprints.
Causes of the Mexican War. Leading causes of the Mexican War included: 1  Texan Annexation. 2  Mexico had warned it would regard annexation as an act of war. 3  When it took place, Mexico did not declare war, but broke diplomatic relations. 4  The Boundary Dispute.
The second basic cause of the war was the Texas War of Independence and the subsequent annexation of that area to the United States. Not all American westward migration was unwelcome. In the 1820's and 1830's, Mexico, newly independent from Spain, needed settlers in the underpopulated northern parts of the country.