Ron, i get a little bit confused after reading all your explanations. so can i conclude from your explanations my own comprehension on this question here?
#1. what the France assumed was not hypothetical, it was an actual case with certainty.
#2. two usages of "would": one is the past version of "will", the other is for hypothetical use, i.e, If I learned English, I would get good score on GMAT.
Here OA (without it their grip on Algeria would never be secure.
) applies to the first usage.
Do i make a right conclusion?