Sieges

Siege in warbanner means directly assaulting an enemy city defense to enter and steal his resources

The defender forces will consist in previously built fortifications and previously placed troops, the defender will have limited deployment points to place his troops, to Access to your defense you need to glick the grayed out área to the south of your town outside of the walls or press the defense button in the bottom left corner of the screen

Fortifications
to build fortifications you need resources, you only can have a limited ammount of fortifications, this ammount is limited by your town hall level, as well as the level limit, once you have built a fortification it cant be removed or stored, and once you have leveled it up you cant remove the upgrade, there are 5 types of fortifications, they do not need to be repaired after they are destroyed, they will be repaired automatically and it will be free having fortifications has a drawback, they do will harm the enemy and make the siege harder for him, but once the enemy destroys a fortification he will get deployment points that he can use to bring more troops, but it will make it almost certain that it will cost far more for your enemy
 * 1) Trenches
 * 2) Watchtowers
 * 3) Sniper towers
 * 4) Artillery tower
 * 5) Artillery trench

Defender
The defender will have fortifications, the troops outside and the garrison under his command to fight back the attacking army, the defender deployment points are limited having even less than those of the attacker, but the defender also has the Garrison, a building that will deploy garrisoned troops once a set percent of the troops outside have been destroyed, this is reccomended to be filled with a mix of British grenadiers, and the strongest line infantry units you can get, especially in melee combat, like Imperial guard, there is not much to be said about defender, as the defender troops will not be commanded by the player in battle, so the best you can do is to get a good defense, good placement of your troops and hope they are able to repel the attacker

its worth noting that the defender will only lose a regiment if all of the soldiers of that regiment died in battle, meaning that if a regiment survives with a single wounded soldier, the whole regiment will be reformed after the battle for free, so usually the battles are more costly for the attacker,

Attacker
The attacker will often have more deployment points than the defender, and the defender can not control his troops in battle, however, this dosnt makes the siege easy, as the defender will have 2 extra resources to call, the first are his fortifications, and the second one, the garrison, the fortification are previously built structures and the garrison will be some kind of reserve troops for the defender that will come out in case that a certain ammount of soldiers (defender) are killed in combat

however, that the enemy has fortifications can be put to your adventage if used correctly, a good tactic is to draw the enemies away from a flank by placing most of the troops in either left or right, and in front of all troops, maybe send troops to other flank too but the flank you want ot draw them to must be the strongest and the one in front, after that, throw artillery to the enemy troops to force them to move and leave the target flank undefended, when that happens, send heavy cavalry and/or uhlans to the other side, the side they will leave undefended, they will start destroying structures and will bring you deployment points, beware though, because it may trigger the guys in the garrison, and if too many enemies from both the outside and the garrison come out at the same time, with the cover of the remaining fortifications, they may be a danger

Bots
AI accounts are easily identified. Whenever you see a name with space between first and last name, it is an AI (Andrew Peters, Samuel Rodriguez etc). The pictures used in an AI account are also quite characteristic and at some point you will be able to tell if an account is AI just by looking at the picture, but stick to the general rule of space to be sure. Another trait: level of AI accounts is always equal or similar to yours (for example, if your level is 15, you will encounter AIs level 14,15,16).

points that should be noted:

a) There is a trap in AI account level 15-16: often, they have 2 bashibazouks in garrison(update:and old guard grenadiers) . Can be defeated of course, but the chances of losing 1 of your uniques against them rise. So better to avoid AIs lvl 15-16, and opt for other level AI accounts when you are around that level(point updated thanks to raton18). b) As you may have noticed from the info above, at some point artillery trenches (cannons) disappear completely, and that doesn’t change ever again. This happens exactly at level 27 ( AI defenses of level 26 are both with and without cannons).

Many thanks to Elbowy for allowing me to use his post from kongregate.com warbanner forum for the bots information, if you want to see the much more detailed post, with also information about AI defenses, uniques, their equipment, heroes and your defense, please go to this link https://www.kongregate.com/forums/721547-warbanner/topics/856781-sieges-ai-defenses-uniques-and-equipment-heroes-your-defense

there are a few points that do not apply to vk and Facebook warbanner players, only to kongregate.com but it will probablly help with other things