diff --git a/Moose Development/Moose/Ops/Flotilla.lua b/Moose Development/Moose/Ops/Flotilla.lua
index 55e44e9b6..adc13b73e 100644
--- a/Moose Development/Moose/Ops/Flotilla.lua	
+++ b/Moose Development/Moose/Ops/Flotilla.lua	
@@ -57,7 +57,7 @@ FLOTILLA.version="0.1.0"
 -- @param #FLOTILLA self
 -- @param #string TemplateGroupName Name of the template group.
 -- @param #number Ngroups Number of asset groups of this flotilla. Default 3.
--- @param #string FlotillaName Name of the flotilla, e.g. "VFA-37".
+-- @param #string FlotillaName Name of the flotilla. Must be **unique**!
 -- @return #FLOTILLA self
 function FLOTILLA:New(TemplateGroupName, Ngroups, FlotillaName)
 
diff --git a/Moose Development/Moose/Ops/Legion.lua b/Moose Development/Moose/Ops/Legion.lua
index 01e35dc3b..366d6a7d5 100644
--- a/Moose Development/Moose/Ops/Legion.lua	
+++ b/Moose Development/Moose/Ops/Legion.lua	
@@ -66,7 +66,7 @@ LEGION.version="0.3.4"
 --- Create a new LEGION class object.
 -- @param #LEGION self
 -- @param #string WarehouseName Name of the warehouse STATIC or UNIT object representing the warehouse.
--- @param #string LegionName Name of the legion.
+-- @param #string LegionName Name of the legion. Must be **unique**!
 -- @return #LEGION self
 function LEGION:New(WarehouseName, LegionName)
 
@@ -396,11 +396,17 @@ end
 -- @param Ops.Cohort#COHORT Cohort The cohort to be added.
 -- @return #LEGION self
 function LEGION:AddCohort(Cohort)
-
-  -- TODO: Check if this cohort is already part of the legion!
   
-  -- Add cohort to legion.
-  table.insert(self.cohorts, Cohort)
+  if self:IsCohort(Cohort.name) then
+  
+    self:E(self.lid..string.format("ERROR: A cohort with name %s already exists in this legion. Cohorts must have UNIQUE names!"))
+  
+  else
+  
+    -- Add cohort to legion.
+    table.insert(self.cohorts, Cohort)
+    
+  end
 
   return self
 end
diff --git a/Moose Development/Moose/Ops/Platoon.lua b/Moose Development/Moose/Ops/Platoon.lua
index 6d6a3e87a..8b380a134 100644
--- a/Moose Development/Moose/Ops/Platoon.lua	
+++ b/Moose Development/Moose/Ops/Platoon.lua	
@@ -56,7 +56,7 @@ PLATOON.version="0.1.0"
 -- @param #PLATOON self
 -- @param #string TemplateGroupName Name of the template group.
 -- @param #number Ngroups Number of asset groups of this platoon. Default 3.
--- @param #string PlatoonName Name of the platoon, e.g. "VFA-37".
+-- @param #string PlatoonName Name of the platoon. Must be **unique**!
 -- @return #PLATOON self
 function PLATOON:New(TemplateGroupName, Ngroups, PlatoonName)
 
diff --git a/Moose Development/Moose/Ops/Squadron.lua b/Moose Development/Moose/Ops/Squadron.lua
index e720de2cc..dc2188a3e 100644
--- a/Moose Development/Moose/Ops/Squadron.lua	
+++ b/Moose Development/Moose/Ops/Squadron.lua	
@@ -93,7 +93,7 @@ SQUADRON.version="0.8.1"
 -- @param #SQUADRON self
 -- @param #string TemplateGroupName Name of the template group.
 -- @param #number Ngroups Number of asset groups of this squadron. Default 3.
--- @param #string SquadronName Name of the squadron, e.g. "VFA-37".
+-- @param #string SquadronName Name of the squadron, e.g. "VFA-37". Must be **unique**!
 -- @return #SQUADRON self
 function SQUADRON:New(TemplateGroupName, Ngroups, SquadronName)