Ruse de Guerre Clarifications:
I asked Polemos Ruse de Guerre author Glenn Pearce his permission to put the following clarifications up on the site. I think I have some more somewhere, when/if I find them, or he makes more, I will add to this post. I have also included my notes on playing Ruse de Guerre solo at the bottom.
You need 1 TP just to be able to rally your entire command. You then need another TP to give each individual base a plus 3 on the dice roll. So yes, 4TP will allow you to rally 3 bases and each one gets a plus 3 on the dice roll.