It seems I got the wrong impression about trading. I thought that each party got the mean of the two's tax values (half of each party's rather than half of their own.
Trade with the Womanians
A City & 1 Farm Army 4 Infantry
B City Army 2 Infantry
C Army 1 Heavy
LTO: 4 Turns Ago
Also, The neutral city doesn't reset, does it? [As in, I can just march my heavy in next turn, right?]