diff --git a/Core/Zone/104-Test-if-GROUP-SET-is-in-ZONE/ZON-104-Test-if-GROUP-SET-is-in-ZONE.lua b/Core/Zone/104-Test-if-GROUP-SET-is-in-ZONE/ZON-104-Test-if-GROUP-SET-is-in-ZONE.lua
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--- /dev/null
+++ b/Core/Zone/104-Test-if-GROUP-SET-is-in-ZONE/ZON-104-Test-if-GROUP-SET-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
+-- https://flightcontrol-master.github.io/MOOSE_DOCS_DEVELOP/Documentation/Core.Set.html
+--
+-- A ZONE has been defined in mission editor. Multiple 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
+
+SetGroupObject = SET_GROUP:New():FilterCoalitions("blue"):FilterPrefixes("Group"):FilterStart()
+
+Zone = ZONE:New( "Zone" )
+Zone:SmokeZone( SMOKECOLOR.White, 90 )
+
+SetGroupObject:ForEachGroupCompletelyInZone( Zone,
+  function( GroupObject )
+    GroupObject:MessageToAll( "I am completely in Zone", 120 )
+    SmokeEveryUnit(GroupObject,SMOKECOLOR.Blue)
+  end )
+
+SetGroupObject:ForEachGroupPartlyInZone( Zone,
+  function( GroupObject )
+    GroupObject:MessageToAll( "I am partially in Zone", 120 )
+    SmokeEveryUnit(GroupObject,SMOKECOLOR.Green)
+  end )
+
+SetGroupObject:ForEachGroupNotInZone( Zone,
+  function( GroupObject )
+    GroupObject:MessageToAll(  "I am not in Zone", 120 )
+    SmokeEveryUnit(GroupObject,SMOKECOLOR.Orange)
+  end )
diff --git a/Core/Zone/104-Test-if-GROUP-SET-is-in-ZONE/ZON-104-Test-if-GROUP-SET-is-in-ZONE.miz b/Core/Zone/104-Test-if-GROUP-SET-is-in-ZONE/ZON-104-Test-if-GROUP-SET-is-in-ZONE.miz
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