Index: binaries/data/mods/public/simulation/components/Formation.js
===================================================================
--- binaries/data/mods/public/simulation/components/Formation.js
+++ binaries/data/mods/public/simulation/components/Formation.js
@@ -311,6 +311,11 @@
 		}
 	}
 
+	let cmpAura = Engine.QueryInterface(this.entity, IID_Auras);
+	if(cmpAura && cmpAura.HasFormationAura()){
+		cmpAura.ApplyFormationBonus(ents);
+		}
+
 	this.offsets = undefined;
 	// Locate this formation controller in the middle of its members
 	this.MoveToMembersCenter();
@@ -345,7 +350,10 @@
 		if (ents.indexOf(ent) !== -1)
 			cmpAuras.RemoveFormationBonus(this.members);
 	}
-
+	let cmpAura = Engine.QueryInterface(this.entity, IID_Auras);
+	if(cmpAura && cmpAura.HasFormationAura()){
+		cmpAura.RemoveFormationBonus(ents);
+		}
 	this.formationMembersWithAura = this.formationMembersWithAura.filter(function(e) { return ents.indexOf(e) == -1; });
 
 	// If there's nobody left, destroy the formation
@@ -394,6 +402,11 @@
 		}
 	}
 
+	let cmpAura = Engine.QueryInterface(this.entity, IID_Auras);
+	if(cmpAura && cmpAura.HasFormationAura()){
+		cmpAura.ApplyFormationBonus(ents);
+		}
+
 	this.MoveMembersIntoFormation(true, true);
 };
 
@@ -433,6 +446,10 @@
 		cmpAuras.RemoveFormationBonus(this.members);
 	}
 
+	let cmpAura = Engine.QueryInterface(this.entity, IID_Auras);
+	if(cmpAura && cmpAura.HasFormationAura()){
+		cmpAura.RemoveFormationBonus(this.members);
+	}
 
 	this.members = [];
 	this.inPosition = [];
@@ -902,7 +919,9 @@
 
 		// merge the members from the twin formation into this one
 		// twin formations should always have exactly the same orders
-		this.AddMembers(cmpOtherFormation.members);
+		let otherMembers = cmpOtherFormation.members;
+		cmpOtherFormation.RemoveMembers(otherMembers);
+		this.AddMembers(otherMembers);
 		Engine.DestroyEntity(this.twinFormations[i]);
 		this.twinFormations.splice(i,1);
 	}
Index: binaries/data/mods/public/simulation/data/auras/formations/formation_column_closed.json
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/data/auras/formations/formation_column_closed.json
@@ -0,0 +1,10 @@
+{
+	"type": "formation",
+	"affects": ["Soldier"],
+	"modifications": [
+		{ "value": "UnitMotion/WalkSpeed", "multiply": 1.20 },
+		{ "value": "UnitMotion/Run/Speed", "multiply": 1.20 }
+	],
+	"auraName": "Forced March bonus",
+	"auraDescription": "+ 20% speed"
+}
Index: binaries/data/mods/public/simulation/data/auras/formations/formation_phalanx.json
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/data/auras/formations/formation_phalanx.json
@@ -0,0 +1,16 @@
+{
+	"type": "formation",
+	"affects": ["Soldier"],
+	"modifications": [
+		{ "value": "Attack/Melee/Hack", "multiply": 1.20 },
+		{ "value": "Attack/Melee/Pierce", "multiply": 1.20 },
+		{ "value": "Attack/Melee/Crush", "multiply": 1.20 },
+		{ "value": "Armour/Pierce", "multiply": 1.20  },
+		{ "value": "Armour/Hack", "multiply": 1.20  },
+		{ "value": "Armour/Crush", "multiply": 1.20  },
+		{ "value": "UnitMotion/WalkSpeed", "multiply": 0.9 },
+		{ "value": "UnitMotion/Run/Speed", "multiply": 0.9 }
+	],
+	"auraName": "Phalanx bonus",
+	"auraDescription": "+20% melee attack, +20% armour, - 10% speed"
+}
Index: binaries/data/mods/public/simulation/data/auras/formations/formation_syntagma.json
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/data/auras/formations/formation_syntagma.json
@@ -0,0 +1,10 @@
+{
+	"type": "formation",
+	"affects": ["Soldier"],
+	"modifications": [
+		{ "value": "UnitMotion/WalkSpeed", "multiply": 0.85 },
+		{ "value": "UnitMotion/Run/Speed", "multiply": 0.85 }
+	],
+	"auraName": "Syntagma bonus",
+	"auraDescription": "- 15% speed"
+}
Index: binaries/data/mods/public/simulation/data/auras/formations/formation_wedge.json
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/data/auras/formations/formation_wedge.json
@@ -0,0 +1,10 @@
+{
+	"type": "formation",
+	"affects": ["Soldier"],
+	"modifications": [
+		{ "value": "UnitMotion/WalkSpeed", "multiply": 1.25 },
+		{ "value": "UnitMotion/Run/Speed", "multiply": 1.25 }
+	],
+	"auraName": "Wedge bonus",
+	"auraDescription": "+ 25% speed"
+}
Index: binaries/data/mods/public/simulation/templates/special/formations/column_closed.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/special/formations/column_closed.xml
+++ binaries/data/mods/public/simulation/templates/special/formations/column_closed.xml
@@ -1,11 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Entity parent="template_formation">
+  <Auras datatype="tokens">
+    formations/formation_column_closed
+  </Auras>
   <Formation>
     <Icon>formations/column_closed.png</Icon>
     <FormationName>Forced March</FormationName>
     <UnitSeparationWidthMultiplier>0.75</UnitSeparationWidthMultiplier>
     <UnitSeparationDepthMultiplier>1.0</UnitSeparationDepthMultiplier>
-    <SpeedMultiplier>1.20</SpeedMultiplier>
     <MinColumns>3</MinColumns>
     <MaxColumns>3</MaxColumns>
   </Formation>
Index: binaries/data/mods/public/simulation/templates/special/formations/phalanx.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/special/formations/phalanx.xml
+++ binaries/data/mods/public/simulation/templates/special/formations/phalanx.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Entity parent="template_formation">
+  <Auras datatype="tokens">
+    formations/formation_phalanx
+  </Auras>
   <Formation>
     <Icon>formations/phalanx.png</Icon>
     <RequiredMemberCount>10</RequiredMemberCount>
@@ -11,7 +14,6 @@
     <MinColumns>5</MinColumns>
     <MaxColumns>20</MaxColumns>
     <MaxRows>8</MaxRows>
-    <SpeedMultiplier>0.9</SpeedMultiplier>
   </Formation>
   <FormationAttack>
     <CanAttackAsFormation>true</CanAttackAsFormation>
Index: binaries/data/mods/public/simulation/templates/special/formations/syntagma.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/special/formations/syntagma.xml
+++ binaries/data/mods/public/simulation/templates/special/formations/syntagma.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Entity parent="template_formation">
+  <Auras datatype="tokens">
+    formations/formation_syntagma
+  </Auras>
   <Formation>
     <Icon>formations/syntagma.png</Icon>
     <RequiredMemberCount>16</RequiredMemberCount>
@@ -29,7 +32,6 @@
         4..8,1..-1: syntagma_back_run
       </run>
     </Animations>  
-    <SpeedMultiplier>0.85</SpeedMultiplier>
     <Sloppyness>0.15</Sloppyness>
   </Formation>
   <FormationAttack>
Index: binaries/data/mods/public/simulation/templates/special/formations/wedge.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/special/formations/wedge.xml
+++ binaries/data/mods/public/simulation/templates/special/formations/wedge.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Entity parent="template_formation">
+	<Auras datatype="tokens">
+    formations/formation_wedge
+  </Auras>
   <Formation>
     <Icon>formations/wedge.png</Icon>
     <RequiredMemberCount>6</RequiredMemberCount>
@@ -7,7 +10,6 @@
     <FormationName>Wedge</FormationName>
     <FormationShape>triangle</FormationShape>
     <ShiftRows>true</ShiftRows>
-    <SpeedMultiplier>1.25</SpeedMultiplier>
     <Sloppyness>0.25</Sloppyness>
     <UnitSeparationWidthMultiplier>1.1</UnitSeparationWidthMultiplier>
     <UnitSeparationDepthMultiplier>1.1</UnitSeparationDepthMultiplier>