A lot of those are very close to other years that I've already done. Example: I won't do 1845 & 1865 because I've already done 1848 and 1861. During the cold war, there were not that many border changes, so I tried to stick with doing one per decade.
Would you also rject other people doing these maps? Also, the thing with 1844/45 is that it is before the Mexican-American War.