The Combat Research Upgrade: Recon allows the player to gather information about an enemy.  The enemy will be alerted to the scouting via a "Scout" Message.  The higher level of research the more information is provided.
Level Description
1 Provides you with the amount of resources stored within a city
2 Provides an estimate on the number of defending troops
3 Shows you the type of defending troops
4 Provides you with an estimate of each type of defending troops
5 Shows you information on your target's hero
6 Provides you with the names of the defending troops
7 Provides you with a closer approximation of defending troops
8 Shows you the boosts that are currently active in a city
9 Provides you with the exat number of defending troops
10 Shows you all the buildings and their levels within a city

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