Somme = more than 1 million men
Verdun = around 700,000 men
Ypres = around 850,000 casualties and 325,000 british soldiers died
I cant really help you on the models but I can on the other question. If it is above it is a positive number if it is below it is a negative number. So whatever number you think it is below just write a negative sign with the number. Hope this helps
A country governed by a central party is the best characterized as a Communist