They basically planned to destroy everything in the south
Because in 1941, is the best time for stealing countries by booming it.
Answer: symbol of swastika was used by so-called "Volkisch denken" (Volkish thinking), modern mystical tradition that existed already at the very beginning of the 19th century. It was kind of mystical and at the same time nationalist kind of thought. Hitler decided to use element of this Germanic mystical thinking. Doing that he seduced many of its representants.
Explanation: Volkish thinking has to with believe in Germans as "Lichtmenschen" (people of the light, people led by Solar principle who are creative and have instinctual divine calling in contrast to Jews who are "arid" and "baren"). There are many people in German tradition who can be considered "volkisch" like Lagarde or Julius Langbehn or later Arthur Moeller van der Bruck who invented term "Das Dritte Reich" (the Third Reich).
Your answer is that the main reason is that people buy land and they needed to get money which means there really greedy people so the buy slaves and force them to work for little or no money so they can sell crops (they made the slaves become farmers) to make profit then they would buy more land and get more slaves to work as farmers on and on. So it spread because one guy did it and he made a lot money and other people wanted to do the same and that's how slavery spread through North America.
Reconstruction - the act of reconstructing, rebuilding, or resembling.
Amnesty - an official pardon for people who have been convicted of political offenses.
Pocket Veto - and indirect veto of a legislative bill by the president or governor by retaining the bill unsigned until it is too late for it to be dealt with during the legislative session.
Freedmen - and emancipated slave.
Hope this helps!!