The Missouri Compromise is connected to the Compromise of 1850 because some people wanted slaves but others didn't. Also, it started as the Missouri Compromise and eventually became the Compromise of 1850.
Secession is connected to Uncle Toms cabin because it came into play because it was involved with slavery.
The Compromise of 1850 was connected to the Missouri Compromise because of Henry Clay because he started with one then went to the other to help.
The Battle of Gettysburg is connected to the Battle of Antietam because both were between the North and the South.
The Emancipation Proclamation is connected to the end of the war because the Proclamation lead to the end of the Civil War.
The end of the war is connected to the Battle of Gettysburg because in the war of Gettysburg they retreated and the end of the war they ended it so they both stopped.