1) He is describing the long guns to be cannons on ships.
2) The Jackies in the poem are probably people who are in charge of the cannons in the ship. They were singing war chanties to celebrate the death of the enemies.
3) The shovel will finish the job of what the gun did.
4) The significance of the title is to show the citizens and soldiers are just tools to contribute towards the war effort.
5) The effect of the contrasting actions shows that war is repetitive and pointless because it causes destruction to the work created. The persona’s attitude towards the soldiers and workmen is that they are endless working tools towards war.
6) The harder part is to build a society back up again rather than bringing it down., such as the case of World War 2, Japan was the cause of World War 2 and caused much destruction in its path, but the America’s bombing of Hiroshima and Nagasaki caused many deaths and a huge amount of destruction, which eventually led to the end of World War 2. Many countries took a long time to rebuild after Japan’s attacks, and caused many problems, such as Singapore taking 15 years to recover while the Japanese only arrived for 3 years. Therefore the harder part is to build a society back up again.
7) Deaths are becoming quicker and more silent, the drum of hoofs change into motors running, showing the changes of sounds heard during war, and the future wars are silent, deadly, showing the change from men to machines, the sound of wheels and the loss of war cries.
8) Gaddafi has been kicked under the dust recently, and the citizens follow their own cause,showing the change from leadership to democracy.