Answer:
On April 21, 1898, the United States declared war against Spain. ... The reasons for war were many, but there were two immediate ones: America's support the ongoing struggle by Cubans and Filipinos against Spanish rule, and the mysterious explosion of the battleship U.S.S. Maine in Havana Harbor
Explanation:
I think this is it. Checked it in Google too. :)
He was reluctant because he thought the border states would secede
Brownsville
Harlingen
La Feria
Los Fresnos
Palm Valley
Port Isabel
Rio Hondo
San Benito
True.
It attracted them to California in 1848.
Also in Australia, Canada, and South Africa.
Hope this is what ur looking for!