Yeah I know it is in the US, but military recruiters visiting a school class would be a major nationwide scandal here, comparable only maybe to visits of some political or religious figures. The only approvable way is a moderated discussion where both positives and negatives are (must be) voiced in age-appropriate way.

The entire culture around the separation of state, its components and citizens is very different here. We really don't want another 40 years of dictatorship - best to stop it right at the beginning.