The 70D is a much more robust camera and has environmental seals to keep dust and moisture out of the camera. Its battery has twice the life of the T6i The T6i is an entry level camera, thus due to its lower cost, it is missing those seals Here is how the sensors compare, top to bottom. As you can see the T6i/750D sensor is just a little bit better than the 70D and unless you are already an amazing photographer, you will not notice the difference.
You can read the comparison here http://www.imaging-resource.com/cameras/...
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.