diff --git a/Strategic/Auto Resolve.cpp b/Strategic/Auto Resolve.cpp
index 5a1cb23a..2d833ef6 100644
--- a/Strategic/Auto Resolve.cpp	
+++ b/Strategic/Auto Resolve.cpp	
@@ -460,7 +460,6 @@ void EliminateAllEnemies( UINT8 ubSectorX, UINT8 ubSectorY )
 		pSector->ubNumJeeps = 0;
 		pSector->ubNumRobots = 0;
 		pSector->ubNumCreatures = 0;
-		pSector->bLastKnownEnemies = 0;
 		//Remove the mobile forces here, but only if battle is over.
 		while( pGroup )
 		{
@@ -1839,7 +1838,6 @@ void RenderAutoResolve()
 					HandleMoraleEvent( NULL, MORALE_BATTLE_WON, gpAR->ubSectorX, gpAR->ubSectorY, 0 );
 					if( ProcessLoyalty() )HandleGlobalLoyaltyEvent( GLOBAL_LOYALTY_BATTLE_WON, gpAR->ubSectorX, gpAR->ubSectorY, 0 );
 
-					SectorInfo[ SECTOR( gpAR->ubSectorX, gpAR->ubSectorY ) ].bLastKnownEnemies = 0;
 					SetThisSectorAsPlayerControlled( gpAR->ubSectorX, gpAR->ubSectorY, 0, TRUE );
 					#ifdef NEWMUSIC
 					GlobalSoundID  = MusicSoundValues[ SECTOR( gpAR->ubSectorX, gpAR->ubSectorY ) ].SoundTacticalVictory[0];
diff --git a/Strategic/Campaign Types.h b/Strategic/Campaign Types.h
index f5b6d996..2c490fcb 100644
--- a/Strategic/Campaign Types.h	
+++ b/Strategic/Campaign Types.h	
@@ -500,9 +500,6 @@ typedef struct SECTORINFO
 	UINT16	ubNumCreatures;				//only set when immediately before ground attack made!
 	UINT16	ubTroopsInBattle, ubElitesInBattle, ubAdminsInBattle, ubCreaturesInBattle;
 
-	INT8	bLastKnownEnemies;			// -1 means never been there, no idea, otherwise it's what we'd observed most recently
-										// while this is being maintained (partially, surely buggy), nothing uses it anymore. ARM
-
 	UINT32	ubDayOfLastCreatureAttack;
 	UINT32	uiFacilitiesFlags;			// the flags for various facilities
 
diff --git a/Strategic/PreBattle Interface.cpp b/Strategic/PreBattle Interface.cpp
index effe444f..36fd826a 100644
--- a/Strategic/PreBattle Interface.cpp	
+++ b/Strategic/PreBattle Interface.cpp	
@@ -407,8 +407,6 @@ void InitPreBattleInterface( GROUP *pBattleGroup, BOOLEAN fPersistantPBI )
 		gubPBSectorY = gpBattleGroup->ubSectorY;
 		gubPBSectorZ = gpBattleGroup->ubSectorZ;
 
-		// get number of enemies thought to be here
-		SectorInfo[SECTOR( gubPBSectorX, gubPBSectorY )].bLastKnownEnemies = NumNonPlayerTeamMembersInSector( gubPBSectorX, gubPBSectorY, ENEMY_TEAM );
 		fMapPanelDirty = TRUE;
 	}
 	else if( gfPersistantPBI )
@@ -1547,14 +1545,12 @@ void RenderPreBattleInterface()
 		{
 			// don't know how many
 			swprintf( str, L"?" );
-			SectorInfo[ SECTOR( gubPBSectorX, gubPBSectorY ) ].bLastKnownEnemies = -2;
 		}
 		else
 		{
 			// know exactly how many
 			i = NumNonPlayerTeamMembersInSector( gubPBSectorX, gubPBSectorY, ENEMY_TEAM );
 			swprintf( str, L"%d", i );
-			SectorInfo[ SECTOR( gubPBSectorX, gubPBSectorY ) ].bLastKnownEnemies = (INT8)i;
 		}
 		x = 57 + (27 - StringPixLength( str, FONT14ARIAL )) / 2;
 		y = 36;
diff --git a/Strategic/Queen Command.cpp b/Strategic/Queen Command.cpp
index 58452a63..23bddfc8 100644
--- a/Strategic/Queen Command.cpp	
+++ b/Strategic/Queen Command.cpp	
@@ -1190,7 +1190,6 @@ BOOLEAN PrepareEnemyForUndergroundBattle()
 //The queen AI layer must process the event by subtracting forces, etc.
 void ProcessQueenCmdImplicationsOfDeath( SOLDIERTYPE *pSoldier )
 {
-	INT32 iNumEnemiesInSector;
 	SECTORINFO *pSector;
 	INT32 iMaxEnemyGroupSize = gGameExternalOptions.iMaxEnemyGroupSize;
     DebugMsg (TOPIC_JA2,DBG_LEVEL_3,"QueenCommand");
@@ -1737,22 +1736,6 @@ void ProcessQueenCmdImplicationsOfDeath( SOLDIERTYPE *pSoldier )
 			}
 		}
 	}
-	if( !pSoldier->bSectorZ )
-	{
-		pSector = &SectorInfo[ SECTOR( pSoldier->sSectorX, pSoldier->sSectorY ) ];
-		iNumEnemiesInSector = NumNonPlayerTeamMembersInSector( pSoldier->sSectorX, pSoldier->sSectorY, ENEMY_TEAM );
-		if( iNumEnemiesInSector )
-		{
-			if( pSector->bLastKnownEnemies >= 0 )
-			{
-				pSector->bLastKnownEnemies = (INT8)iNumEnemiesInSector;
-			}
-		}
-		else
-		{
-			pSector->bLastKnownEnemies = 0;
-		}
-	}
 }
 
 //Well, not so rarely with mobile reinforcements!
diff --git a/Strategic/Strategic Movement.cpp b/Strategic/Strategic Movement.cpp
index 588f91c1..323f9100 100644
--- a/Strategic/Strategic Movement.cpp	
+++ b/Strategic/Strategic Movement.cpp	
@@ -1946,11 +1946,6 @@ void GroupArrivedAtSector( UINT8 ubGroupID, BOOLEAN fCheckForBattle, BOOLEAN fNe
 
 	if ( pGroup->usGroupTeam == OUR_TEAM )
 	{
-		if( pGroup->ubSectorZ == 0 )
-		{
-			SectorInfo[SECTOR( pGroup->ubSectorX, pGroup->ubSectorY )].bLastKnownEnemies = NumNonPlayerTeamMembersInSector( pGroup->ubSectorX, pGroup->ubSectorY, ENEMY_TEAM );
-		}
-
 		// Flugente: do not award experience gain if we never left
 		if (!fNeverLeft)
 		{
@@ -3769,8 +3764,6 @@ INT32 GetTravelTimeForFootTeam( UINT8 ubSector, UINT8 ubDirection )
 void HandleArrivalOfReinforcements( GROUP *pGroup )
 {
 	SOLDIERTYPE *pSoldier;
-	SECTORINFO *pSector;
-	INT32 iNumEnemiesInSector;
 	INT32	cnt;
 
 	if ( pGroup->usGroupTeam == OUR_TEAM )
@@ -3834,22 +3827,6 @@ void HandleArrivalOfReinforcements( GROUP *pGroup )
 		gfPendingNonPlayerTeam[MILITIA_TEAM] = TRUE;
 		AddPossiblePendingMilitiaToBattle( );
 	}
-
-	//Update the known number of enemies in the sector.
-	pSector = &SectorInfo[ SECTOR( pGroup->ubSectorX, pGroup->ubSectorY ) ];
-	iNumEnemiesInSector = NumNonPlayerTeamMembersInSector( pGroup->ubSectorX, pGroup->ubSectorY, ENEMY_TEAM );
-	if( iNumEnemiesInSector )
-	{
-		if( pSector->bLastKnownEnemies >= 0 )
-		{
-			pSector->bLastKnownEnemies = (INT8)iNumEnemiesInSector;
-		}
-		//if we don't know how many enemies there are, then we can't update this value.
-	}
-	else
-	{
-		pSector->bLastKnownEnemies = 0;
-	}
 }
 
 BOOLEAN PlayersBetweenTheseSectors( INT16 sSource, INT16 sDest, INT32 *iCountEnter, INT32 *iCountExit, BOOLEAN *fAboutToArriveEnter )
diff --git a/Tactical/Overhead.cpp b/Tactical/Overhead.cpp
index 84fbb739..5aa32012 100644
--- a/Tactical/Overhead.cpp
+++ b/Tactical/Overhead.cpp
@@ -7520,11 +7520,6 @@ BOOLEAN CheckForEndOfBattle( BOOLEAN fAnEnemyRetreated )
 
     if ( fBattleLost || fBattleWon )
     {
-        if( !gbWorldSectorZ )
-        {
-			SectorInfo[SECTOR( gWorldSectorX, gWorldSectorY )].bLastKnownEnemies = NumNonPlayerTeamMembersInSector( gWorldSectorX, gWorldSectorY, ENEMY_TEAM );
-        }
-
 		// Flugente: note number of wounded for campaign stats
 		UpdateWoundedFromSectorInfo( gWorldSectorX, gWorldSectorY, gbWorldSectorZ );
     }