If I've just started upgrading something, sometimes I'll just stop the upgrade to upgrade something else. This last time I stopped a mortar I had just started (lost 3.5 million gold) but started a tank depot (4.25 gold cheaper).Since it takes 10 or more days to upgrade almost anything on global age this sale events could have a longer duration.
I knew it!!!!
I know l said l wouldn't upgrade anything for 4 weeks (as if anyone believed that) but l wanted to upgrade my Napoleon to lvl 21 and l could only do that with a lvl 5 fort - so guess what upgrade l started 3 days ago ...............
I give up!!!