Fred Korematsu argued that internment was unconstitutional mainly because internees did not receive due process.
In President Franklin D. Roosevelt’s EO 9066, residents from the West Coast who had Japanese ancestry were to be deemed as enemies. Fred Korematsu pointed out that internment violates his constitutional rights. He also pointed out that internment was an obvious type of racial discrimination.
The Union military strategy that was used was the Anaconda Plan in which the Union would blockade all ports and entrances to the enemy so that they couldn't get supplies. The military would also chase the army to wear them out.
