april 12 1867 southern forces fire upon fort sumter south carolinm, how did this cause the july 21,1867 first battle of bull run

The cause of the attack on Fort Sumter was because the Union fort was in Confederate territory and its commander refused to surrender. The attack on Fort Sumter was the beginning of the Civil War because it was the first time the Confederates fired on a Union fort.

Explanation:

I just looked it up so my not help

idk

explanation: idk

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.