Fascists represent an authoritarian and extremely far right wing form of highly nationalistic government, so they would gain power in times of social conflict that would leave people feeling threatened. This would be in: 1.), 2.), & 5.)
I don't think 3.) would apply as this was a huge issue in the Soviet Union, and yet the fascist government remained in power for decades. I also do not think 4.) would apply as growing minority power would limit the power of the potentially fascist "majority."
Accurate maps and sea charts helped them
A. The opportunity to establish the US as a Military power :)
