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View Full Version : lib Exploiting the battlefield AI - baiting a defender



econ21
12-11-2002, 12:32
[This post is rediscovering the wheel, so apologies for boring some better players.]

For a long time, I found the battlefield AI on MTW really good. I did not find any aspect of the tactical AI I could regularly "exploit" (the strategic AI was far worse, with its relative neglect of trade).

On the defense, I could hold a hill with a spearline backed by archers and flankers but only with sufficient force. Against a much larger or higher valour army, I still got steamrollered. This got harder post-patch as multiple Royal knights (Danes, Aragonese etc) or other heavy cav could tear up vanilla spearmen (before the patch, they were fairly impotent). However, typically, you could survive with modest casualties.

On the offense, casualties were higher - partly in my case because the defender would often counter-attack as I was deploying. For example, the Rebel Highlanders or Gallowglasses in the early period could do a lot of violence to an early English force caught unprepared. I would try to out-maneouvre the defender - eg taking higher ground or turning a flank - but often it would be a tough battle with near parity of numbers.

All this meant that the SP game proved a fun challenge. You could win if you fought well but there was an element of danger and difficulty; you needed to employ sound battlefield tactics and to build a strong economy. This is different from 90% of strategy games I play (especially wargames for some reason) where the AI just cannot make for a challenging game once you have learnt its foibles.

However, I may have found a deficiency of the AI that can make things a little too easy. It was suggested to me by a reply to my post on the old board asking for suggestions for offensive tactics. The reply said "whatever you do, make them move". I mentally bookmarked this reply, as it seemed to be the one that indicated my existing offensive tactics were missing something fundamental. Now, belatedly, I think I have experienced enough to understand it. (I tend to play rather a conservative game, nearly always on the tactical defensive).

The AI seems rather footloose on the defensive. If you approach them, they seem very inclined to move to attack you and so give up their nice high ground. What's worse, they sometimes seem to move piecemeal - so one unit will go for you, another will belatedly set-off to join them as the first is getting chewed up etc.

I found this last night trying to invade rebel Scotland in the early campaign; and then invading Aragon.

First, I'll describe what happened with my old offensive tactics. I invaded Scotland very early in an English campaign on normal difficulty. I deployed my army of 3 spears to the front, backed by 3 longbows (bribed Welsh rebels http://www.totalwar.org/forum/non-cgi/emoticons/biggrin.gif ) and 1 archer, flanked by 2 royal knights. Then I moved uphill to approach the highlanders. The rebels, a mere 4 highlanders +1 archer, promptly launched a wonderful downhill highland charge into my army. The longbows did little damage and my spearline crumpled under the charge. One unit of my knights hit the rebel archers in the rear, but in retrospect, this was a mistake as it could not now contribute to the decisive melee. The other unit of knights flanked the highlanders but then got overwhelmed by a counter-charge. My spearmen routed, my ranged troops ran for their lives (no more longbows for 100 years http://www.totalwar.org/forum/non-cgi/emoticons/mecry.gif) and I quit the game in disgust at my ineptitude.

Learning from this, what I did second time round was to set up for a defensive battle with my main force set up far away on another hill. (I confess, I brought an extra spear and royal knight for my second attempt). Then I baited the highlanders with a unit of archers, retreating before them and leading them to my defensive hilltop position. (The archers were actually a bad choice for this role against the faster highlanders; cavalry would have been better). My longbows on the hill rained death on the highlanders, able to concentrate fire to a degree, as the enemy approached piecemeal. My spears held their own against the highlanders, due to the height advantage and the piecemeal advance of the enemy. The knights were also much more effective. Not facing a single fast masse charge, they had more time to dance around, tearing up weakened enemy units in turn and then retreating out of danger. I lost "only" about 100 spearmen (oh, how far spearmen have fallen, post-patch) and some of my tad too slow archer unit bait.

Using such "baiting" tactics, I suspect that you can actually win an offensive battle with lower casaulties than a defensive one, because you will be attacked in a more piecemeal way.

It is almost like the AI units have a "threat radius" and will move to attack anyone who enters that zone. In flat terrain or against an archer-deficient force you can exploit this with a more simple tactic of just approaching to the edge of this zone and whittling them down by ranged force. This is how I cope with those rebels in Ireland, who can otherwise do a lot of damage if allowed to charge en masse.

Anyway, I am a little sad I have found this because before in my naive state, as I said, I found MTW provided an good challenge. I know the baiting tactic worked at Hastings (and is recommended in the strategy guide) but it does seem a little easy to exploit. Maybe the battlefield AI needs tweaking, either to make it more stationary or at least to make it move en masse, not piecemeal.

Have other people experienced or exploited the same thing? It is early days for me playing with knowledge of this, so I may be over-reacting but baiting does seem an incredibly effective offensive tactic.

LovelyHaji
12-11-2002, 13:54
I don't see this as an exploit, i think you've just learnt how to play the game Going uphill to attack an enemy head on with the forces you described is a very bad idea. You should always try to flank the enemy, and attack from higher ground if possible. If you stay mobile, they will be forced to move. YOu have take the iniative.

econ21
12-11-2002, 14:11
LovelyHaji, I am not sure you get my point. Of course, you should flank and try to take the high ground. I'm not talking about those commonsense tactics. The "bait" tactic I am talking about is putting one solitary unit in front of the enemy to lure them down from their mountain position and lead them to your mountain. I think it works against the AI and I know it is cheesy (it would not work against a human).

TheViking
12-11-2002, 15:02
i agree its to easy to lure the ai where you want it. If the ai is the defending part and have a hill it shouldnt attack if you use a "bait" not like it does now anyway. But then again i think the overall tactic that the ai use is very poor. thats my opinion

LovelyHaji
12-11-2002, 15:20
Simon - i see. I didn't realise you meant luring an ENTIRE army away. that is a bit rubbish. A similar tactic i have been using when defending is a couple of Turcoman horse archers peppering their weaker troops. Their army will quite happily follow my horsies all the way to the centre of my main army, rather than trying a wholesale flanking manouveur. HOwever, the AI does consistently attempt to flank with whatever cavalry it has, while engaging my centre with it's main force, which i find quite nice.

Now i think a little, i do recall marching my boys to a bit in front of the bottom of a v steep hill the computer was sat on. Their units did come down one by one, till the whole army decided to leave their good position and fight me on the level ground. THis isn't quite the same as what you described, as i have never tried that. THe computer does abandon good positions a little too easily.

econ21
12-11-2002, 15:58
Yes, the fact that the AI sometimes comes down after you "one by one" is why I said that the lure tactic makes attacking easier than defending. At least when you are defending from the outset, the AI comes at you en masse. By contrast, if as the attacker, you lure them out from their defensive positions, you can use concentration of force to wipe them out one by one with little loss.

I am not sure what the solution is. One the one hand, I like that the AI is not purely passive even on the defensive and get a thrill from those occaisional wild highland charges that catch you unprepared. On the other, it does seem a little easy to exploit. On balance, like the Viking says, I would like the AI to stay put a little more if he has a good position, unless he can safely catch your bait in the open before it scuttles back to your main line. Maybe allow the Hastings tactic to work once in a while, but not always.

solypsist
12-11-2002, 19:07
an easy way to have the AI defender move from its vantage point in the later stages of the game is with cannons. position yourself atop a hill nearby (which will require some maneuvering), and within view of the enemy, then start bombarding the enemy with the cannons in your deployment zone. the AI will usually start marching towards you after taking a few hits.

hoof
12-11-2002, 19:47
It sounds like a catch-22 from the AI's standpoint. By sending down a unit to engage your bait unit the AI could be considered exploiting an opportunity to ravange one of your units (esp. if you're distracted or focused somewhere else). More than once have I seen one of my units running away because the AI did just this when I wasn't watching all my units like a hawk.

I do just this when the enemy has a particularly vulnerable unit exposed and I have a spare cavalry unit that I can use.

However, this approach can be used against the AI just as you describe. A human player would realize what's happening and stop sending units down.

To compound the trap problem with the AI, the AI will see your units closing in on his now-exposed unit and throw in support. This is why the army comes crashing down off its hillside.

Al Qasim Hussein
12-11-2002, 20:38
I've got one that really ruins the game. On more than one occasion (usually when I'm using siege weapons, but not always) I try to lure the enemy off the hill and, as you guys have described, they start moving towards me. Then, inexplicably, they halt just within arrow/catapult/whatever range and start getting mauled. THEN, to cap the climax, one by one each unit marches down and attempts to occupy the SAME SPACE being filled by the unit I'm currently destroying. I recently invaded Aragon and faced a Spanish army more than twice my size (~4000). This tactic got them off the hill, killed their king, routed the first wave of units and cause the dumptruck load of peasants they called in as reinforcements to rout as soon as they came on the map. Now, I'm not saying I didn't appreciate the help, but I was anticipating a bloody mess and didnt lose a single man. That kinda saps the fun out of the game when it happens multiple times.

LadyAnn
12-11-2002, 21:20
"Baiting" is one of the technique used in MP against human players. "Give the enemy something he wants to take so I can wage battle where and when I want it" -- without quoting exactly Sun-Tzu http://www.totalwar.org/forum/non-cgi/emoticons/wink.gif

You see that good generals know when to chase and when to halt his troops and regroup.

I am not saying that there is no bug in the AI. Just throwing my Florins out the window...

Annie

Red Peasant
12-11-2002, 21:39
Maybe it would help if the AI was re-jigged so as to dispatch an 'appropriate' response, enough of the correct type of countering unit to see off the 'baiting' unit. This could be tempered if the baited force is highly impulsive, or the rest of the 'baiting' army is unseen, or in ambush.

Musashi
12-16-2002, 08:24
The problem with the AI is that it basically has direct control of every unit at all times... It's like a collection of little commanders instead of one big commander. Now this is both a strength and a weakness, because it can respond with superhuman levels of control at the unit level, but as a consequence it sometimes (Often) misses the bigger picture...

-Musashi

pdoan8
12-16-2002, 10:22
I agree that AI sometimes keep track with too much info about troops or they may be take the rock-scissors-paper system too seriously. For example, I could use my archer as bait to draw AI cav into a trap I set up with my anti-cav units. Once the AI decides to chase my archer, they could easily expose their flank to my anti-cav units and get decimated quickly. I may consider it as an AI weakness that I am exploiting. However, it could be very dangerous if I can't manage my troops correctly or I can't respond well and out-maneuver the AI movement. But both could happen in real life as one commander may have better commanding skill than the other.

HopAlongBunny
12-16-2002, 17:10
Its not actually exploiting the AI at all.

Watch the CA vs CM videos. You will see human opponents baited into traps. Human or computer, bait and slaughter are a lot of what tactics are all about.

For a lot of great ideas on how to massage the battlefield, those replays are the ticket http://www.totalwar.org/forum/non-cgi/emoticons/smile.gif