The Tone was Happy and sad because everyone happy because the war is over but they're sad because their captain is dead.
The Author was comparing Lincoln has a captain because he lead a group of soldiers and with those soldiers they won the civil war.
1. A crowd of people are cheering 2. Another crowd of people are musicians playing music 3. Some people are happy they the civil war is done and some other people are sad because Lincoln died 4. Some people are having a banquet and celebrating because the war is over5. The people on the boat can hear everyone else cheering and celebrating
21 lines, It Rhymed AABB
The major theme that runs throughout the poem is the death of Abraham Lincoln at the end of the Civil War, which deprived the United States of the great president.
The captain is Lincoln, the voyage is the war and the ship is the United States.