diff --git a/Core/Zone/103-Test-if-GROUP-object-is-in-ZONE/ZON-103-Test-if-GROUP-object-is-in-ZONE.lua b/Core/Zone/103-Test-if-GROUP-object-is-in-ZONE/ZON-103-Test-if-GROUP-object-is-in-ZONE.lua
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index 0000000..9b1d5a1
--- /dev/null
+++ b/Core/Zone/103-Test-if-GROUP-object-is-in-ZONE/ZON-103-Test-if-GROUP-object-is-in-ZONE.lua
@@ -0,0 +1,51 @@
+---
+-- Author:       FlightControl
+-- Created:      31.03.2017
+-- Contributors: kaltokri
+-- Modified:     18.02.2024
+--
+-- # Documentation:
+-- https://flightcontrol-master.github.io/MOOSE_DOCS_DEVELOP/Documentation/Core.Zone.html
+-- https://flightcontrol-master.github.io/MOOSE_DOCS_DEVELOP/Documentation/Wrapper.Group.html
+-- https://flightcontrol-master.github.io/MOOSE_DOCS_DEVELOP/Documentation/Core.Message.html
+--
+-- A ZONE has been defined in mission editor. Three groups are placed in the area.
+-- The zone will be marked by white smoke and very group is marked by smoke in different colors.
+--
+-- # Guide:
+--
+-- 1. Start the mission.
+-- 2. Locate the zone marked with white smoke.
+-- 3. Search the different groups and their units.
+-- 4. Compare the situation with the messages.
+
+function SmokeEveryUnit( Group, Color )
+  local units = Group:GetUnits()
+  for i, unit in ipairs(units) do
+    unit:Smoke( Color, nil, 2 )
+  end
+end
+
+GroupGreen  = GROUP:FindByName( "GroupGreen" )
+GroupOrange = GROUP:FindByName( "GroupOrange" )
+GroupBlue   = GROUP:FindByName( "GroupBlue" )
+
+Zone = ZONE:New( "Zone" )
+Zone:SmokeZone( SMOKECOLOR.White, 90 )
+
+SmokeEveryUnit(GroupBlue,SMOKECOLOR.Blue)
+GroupBlue:MessageToAll( "Group is completely in Zone: " .. tostring( GroupBlue:IsCompletelyInZone( Zone ) ), 120 )
+GroupBlue:MessageToAll( "Group is partially in Zone:  " .. tostring( GroupBlue:IsPartlyInZone( Zone ) ), 120 )
+GroupBlue:MessageToAll( "Group is not in Zone:        " .. tostring( GroupBlue:IsNotInZone( Zone ) ), 120 )
+MESSAGE:New( "---", 120 ):ToAll()
+
+SmokeEveryUnit(GroupGreen,SMOKECOLOR.Green)
+GroupGreen:MessageToAll( "Group is completely in Zone: " .. tostring( GroupGreen:IsCompletelyInZone( Zone ) ), 120 )
+GroupGreen:MessageToAll( "Group is partially in Zone:  " .. tostring( GroupGreen:IsPartlyInZone( Zone ) ), 120 )
+GroupGreen:MessageToAll( "Group is not in Zone:        " .. tostring( GroupGreen:IsNotInZone( Zone ) ), 120 )
+MESSAGE:New( "---", 120 ):ToAll()
+
+SmokeEveryUnit(GroupOrange,SMOKECOLOR.Orange)
+GroupOrange:MessageToAll( "Group is completely in Zone: " .. tostring( GroupOrange:IsCompletelyInZone( Zone ) ), 120 )
+GroupOrange:MessageToAll( "Group is partially in Zone:  " .. tostring( GroupOrange:IsPartlyInZone( Zone ) ), 120 )
+GroupOrange:MessageToAll( "Group is not in Zone:        " .. tostring( GroupOrange:IsNotInZone( Zone ) ), 120 )
diff --git a/Core/Zone/103-Test-if-GROUP-object-is-in-ZONE/ZON-103-Test-if-GROUP-object-is-in-ZONE.miz b/Core/Zone/103-Test-if-GROUP-object-is-in-ZONE/ZON-103-Test-if-GROUP-object-is-in-ZONE.miz
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