I'm trying not to laugh but these problems were encountered here over 5 years ago and it amazes me how the same issues tend to come full circle.
I am aware you've not been here overly long but one positive must be the proof you and other new members bring that shows the longevity of the SH3 game.
*On a serious note*
If adding the extra letter/digit fails to work you can change the file in your last save from 'war ended' true to false.
It's not a bad idea to back up your SH3 folder in MyDocs on a regular basis but be advised, it will only be compatable if you add no additional mods.
Good Luck Kaleun