Final answer:
The immediate result of Lincoln's election was that seven southern states seceded from the Union.
Step-by-step explanation:
An immediate result of Lincoln's election in 1860 was that seven southern states seceded. Following Lincoln's victory in the presidential election, several southern states, including South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas, decided to leave the Union and form their own separate government.
The attack on Fort Sumter did not occur immediately after Lincoln's election; it took place in April 1861. Similarly, the Battle of Antietam did not happen until September 1862, long after Lincoln had been elected. The statement that the Union chose Jefferson Davis as its leader is also incorrect, as Davis became the president of the Confederacy, not the Union.
Learn more about Lincoln's election