Which comes first - Op Fire of Minefields

[larrymm]

I'm going on slim evidence here as there is no (AFAIK) direct statement in the rules to support me:

For Minefields, 16.71 states "When a unit enters a hex containing one or more minefields…"
For Op Fire, 13.11 states "Fire must be resolved before the unit enters a new hex."

I interpret these statements to imply that minefield effects occur as soon as the unit enters the hex, while Op Fire is a more deliberative affair that occurs "before the unit enters a new hex." Thus, minefield effects are applied first and only then is Op Fire resolved.
Again, this is my reading of the rules, but it does seem to me to be the desired "real word" analog: minefields are laid not so much to destroy enemy units but rather to channel them into killing zones where Op Fire can then be applied to maximum effect.