Hostilities began in 1754 and ended in 1763 that is the reason that it is called the seven years war
I'm not sure if this is correct, but I believe that establishing a government was a major issue. Deciding how the government should be run took a while to figure out, and many drafts to get the final Constitution.
Hope this helps! Correct me if I'm wrong!
Melzmk. Nak s. Am Msn bianzi sksisnos z was ksmi