The 900/1200 will be right at max load, you should use 120v for your calculations. Resulting in 840 watts. Whether the generator can handle it will be based on quality and condition of the generator and sprayer.
If the generator is an "inverter" type then it probably won't work at all.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.