Allied units in F'40

[Volcano Man]

I would say that the German's biggest enemy is not your Allied units, but rather their enemy is time itself. The only real tactic you can use is to try to keep them busy in order to slow their advance. Hopefully by doing this and forcing them to rush it, they will be greatly fatigued by the latter stages of the campaign, which should hopefully allow you to do some damage with your tanks and better units that arrive and with the Brits.

I would say, avoid shooting at the Germans altogether with your infantry, let the Germans do the shooting -- don't make it easier on them by getting yourself disrupted or broken on your turn. When you let them shoot at you, it costs MPs, which may prevent assaults on that turn, which costs time. This is a lot different than you disrupting yourself on your turn so that all they have to do is move up and assault on theirs. You can however shoot all you want with your tanks versus their tanks -- it should be encouraged, and of course to use artillery as much as possible (obviously).

Either way you slice it though, playing the allies in France '40 takes an iron will and a strong stomach. :o It is quite similar to playing the Italians in Compass '40; not impossible to very very tricky and sometimes depressing.

I hope that helps...