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resistance force

You haven't provided any context, so we have to try and guess the sense in which it is used in your text...

While "deterrence force" would be an acceptable literal translation, I have found that it is mostly used in the sense of "military force of deterrence", e.g. here:
In 1995, France presented the ambitious idea of having a joint deterrence force with the purpose of favouring the European reflection about ...
www.voltairenet.org/article135405.html

It is far more common to say "deterrence capacity" or simply "deterrence", e.g
The end of Israel's deterrence capacity? If war breaks out. 23/10/2007 | Ha'aretz. By Reuven Pedatzur The next war with Syria, if there is one, ...
www.normanfinkelstein.com/the-end-of-israels-deterrence-cap...

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