I think the easiest answer is to create a pivot table based on on the data on your first worksheet. You can format the pivot table so that it looks similar to your original spreadsheet and then filter your column A to select only the letter "C".
To automate this, use something like the following.
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.