Here's the smaller version https://www.dropbox.com/scl/fi/w1e35akhzlsklm4subxrr/MyOldCampaign_150dpi.pdf?rl... - I converted it using the "ebook" preset in Ghostscript (using the instructions from https://itsfoss.com/compress-pdf-linux/ but Ghostscript is a cross-platform program so one could do the same not on Linux).
eta: actually the redrawn world map on p6 didn't turn out that well :/ it seems to have thought it was quite a small image size so not given it very high resolution, I'll see if I can do anything about that.