<span>The Japanese attack on pearl harbor had caused the US to end isolation and enter world war two which pearl harbor was the US Hawaii naval fleet base without provocation from the US.
Hope that help (:</span>
I can only answer some of these but
3 - Harriet Beecher
4 - Popular Sovereignty
^ These are confirmed, I'm sure of it
Now, I'll assume on these ones
2 - Bleeding Kansas
1 - Wilmot Proviso
5 - Fugitive Slave Act
I apologize if I'm wrong on these
The result of the Mexican war
