We had some ideas about a unit that could cross borders without a war declaration, and would be able to collect
data about the army of a country, locations, quality of units, ammunition etc. and if enough data is collected,
make it possible to create an attack plan.
The "invaded" country, should get a warning that such a unit is in the country.
It could destroy it by use of the same type of unit if it has some.
so these units can only attack the same type of units.
we did not go into many details as such a function requires some serious development and we
were frequently in a tight place with a large backlog of things to be done.
currently, the backlog is even larger, but we are at a point when future developments
will become easier.
If we want to add such a feature, it should be described in more details, and as Unsthable said,
must be recondidered and thought of in depth.