The main problems of evidence in dealing with early civilizations is that much of the potential evidence itself--such as tools, homes, etc--has vanished due to the fact that it was made of materials such as clay that could not withstand the test of time and weather.
A- FDR claimed that there was a military need amid a fear of japanese americans being loyal to the Japanese cause, there was a real fear of the West Coast being attacked by the Japanese during the early months of the war.
