How to "reveal all armies" with spies?

cycle9 wrote:

It is not normal for players to reveal how much they have in their wallet.

You-Know-Who wrote:

Some spies might have done their job by revealing no buildings in the province

K.Rokossovski wrote:

There's debate about this... some say the spies meant for reveals can be "distracted" by buildings and attack them instead of revealing, others say the chance for reveal is the same... @freezy ?

K.Rokossovski wrote:

Put them in a province without any buildings, so they don't get distracted by trying to blow those up.

I usually use four, with an estimated success chance of 60-70%.