In March 2019 the Library of War was introduced in King of Avalon. This is a new way to provide boosts to your troops.

King of Avalon Update v5.5.0 Changes

03/27/2018 - -

Explanation of the new features in King of Avalon v5.5.0 such as the new Library of War feature, and the increased amount of Goods Exchange Equipment you can transfer.


The Hall of War has been extended with a new menu item, Library of War, available when Hall of War is lvl 22 or higher. When activating this item you will see an overview of War Strategies categorized in three sections, Infantry, Bowmen and Cavalry. Each War Strategy provides unique benefits to a troop type or a specific troop type and tier. By assiging Tome of Wars to a War Strategy the benefits of the War Strategy become active.

Available War Strategies

For each of the troop types Infantry, Bowmen and Cavalry there is a War Strategy for each specific tier of troops and two War Strategies that apply to all troops of that type. These general two ones are available as soon as you have built the corresponding troop training building. The tier specific ones are available once you have upgraded the corresponding troop training building to the level that unlocks that tier (at lower levels it isn't useful anyway). Each War Strategy has 5 levels, each require one additional Tome of War.

War Strategies sometimes only apply if certain conditions are met, and for some one boost of your troops is sacrifized to add benefits to another. Make sure the ones you use complement your game play, I share some suggestions below.

Tome of War Requirements

You need a Tome of War to active a War Strategy or upgrade it to the next level. These Tome of Wars require an amount of War Scrolls, standard resources and require time to learn. Each subsequent Tome of War you learn has increased requirements. In table below I show the requirements as far as I know them, please let me know in the comment section if you know requirements for more Tome of Wars.

Level Resources Original Time
1 1.29M Food
2.59M Wood
529K Iron
203K Silver
29 War Scroll
2 2.61M Food
5.22M Wood
1.07M Iron
409K Silver
58 War Scroll
3 3.95M Food
7.89M Wood
1.61M Iron
619K Silver
88 War Scroll
4 5.31M Food
10.61M Wood
2.17M Iron
832K Silver
119 War Scroll
1d 05:37:44
5 6.69M Food
13.38M Wood
2.73M Iron
1.05M Silver
149 War Scroll
6 8.10M Food
16.20M Wood
3.31M Iron
1.27M Silver
181 War Scroll
1d 21:14:30
7 9.54M Food
19.08M Wood
3.89M Iron
1.50M Silver
213 War Scroll
2d 05:15:42
8 11.00M Food
22.00M Wood
4.49M Iron
1.73M Silver
246 War Scroll
2d 13:25:36
9 12.49M Food
24.98M Wood
5.10M Iron
1.96M Silver
279 War Scroll
2d 21:44:20
10 14.00M Food
28.01M Wood
5.72M Iron
2.20M Silver
313 War Scroll
3d 06:12:00
11 14.13M Food
28.27M Wood
5.77M Iron
2.22M Silver
316 War Scroll
3d 06:55:11
12 14.26M Food
28.53M Wood
5.82M Iron
2.24M Silver
319 War Scroll
3d 07:38:45
13 14.39M Food
28.79M Wood
5.88M Iron
2.56M Silver
322 War Scroll
3d 08:22:40
14 14.53M Food
29.05M Wood
5.93M Iron
2.28M Silver
324 War Scroll
3d 09:06:55
15 14.66M Food
29.32M Wood
5.99M Iron
2.30M Silver
327 War Scroll
3d 09:51:29
16 14.79M Food
29.59M Wood
6.04M Iron
2.32M Silver
330 War Scroll
3d 10:36:20
17 14.93M Food
29.86M Wood
6.10M Iron
2.34M Silver
333 War Scroll
3d 11:21:28
18 15.06M Food
30.13M Wood
6.15M Iron
2.36M Silver
336 War Scroll
3d 12:06:50
20 15.34M Food
30.67M Wood
6.26M Iron
2.41M Silver
343 War Scroll
3d 13:38:19
21 15.47M Food
30.95M Wood
6.32M Iron
2.43M Silver
346 War Scroll
3d 14:24:23
22 15.60M Food
31.20M Wood
6.30M Iron
2.40M Silver
349 War Scroll
3d 15:10:40
23 15.70M Food
31.50M Wood
6.40M Iron
2.40M Silver
352 War Scroll
3d 15:57:09
25 16.00M Food
32.00M Wood
6.50M Iron
2.50M Silver
358 War Scroll
3d 17:30:40
26 16.10M Food
32.30M Wood
6.60M Iron
2.50M Silver
361 War Scroll
3d 18:17:42
27 16.30M Food
32.60M Wood
6.60M Iron
2.50M Silver
364 War Scroll
3d 19:04:55
28 16.40M Food
32.90M Wood
6.70M Iron
2.50M Silver
367 War Scroll
3d 19:52:17
29 16.50M Food
33.10M Wood
6.70M Iron
2.60M Silver
371 War Scroll
3d 20:39:49
32 17.00M Food
34.00M Wood
6.90M Iron
2.60M Silver
380 War Scroll
3d 23:03:19
33 17.10M Food
34.30M Wood
7.00M Iron
2.60M Silver
383 War Scroll
3d 23:51:26
34 17.30M Food
34.60M Wood
7.00M Iron
2.70M Silver
387 War Scroll
4d 00:39:41
55 20.50M Food
41.10M Wood
8.30M Iron
3.20M Silver
459 War Scroll
4d 18:50:08
56 20.70M Food
41.40M Wood
8.40M Iron
3.20M Silver
463 War Scroll
4d 19:40:49
60 21.10M Food
42.30M Wood
8.60M Iron
3.30M Silver
473 War Scroll
4d 22:13:19
69 22.50M Food
45.00M Wood
9.20M Iron
3.50M Silver
504 War Scroll
5d 05:55:00

War Scrolls

At this moment the only free way to get War Scrolls is as one of the rewards from the Royal Arena.

Resetting War Strategies

For 1000 gold you can reset your War Strategies. Resetting will remove all active boosts and return all Tomes of War to you. This is relatively cheap so you don't have to worry too much about making wrong decisions when assigning the Tomes of War.

Tips on War Strategies

If you use different troop tiers for either PvE or PvP combat you should for sure consider going for the War Strategies that provide boosts for all tiers of a troop type.

Since the next Tome of War is going to be more expensive irrespective of whether you assign it to the same or different War Strategies, there is no direct benefit of focusing on different War Strategies, better to determine which one is best for you, upgrade that one to level 5, and only afterwards focus on a new War Strategy.

From the War Strategies that provide boosts to all tiers I like Unassailable (Infantry, increase defense for all infantry troops), Arrows of Vengeance (Bowmen, adds part of the Bowmen Defense to Bowmen Attack), Defiant Charge (Cavalry, adds part of the Cavalry Defense to Cavalry Attack).

I find it difficult to interpret the value of Sacrifice (Infantry). One battle consists of many subbattles and as long as you still have 50% of your original infantry, infantry will absorb damage aimed at other troop types. I guess this is good... (btw, initially I thought march had to contain minimum 50% infantry for this to be active, that understanding was wrong).

I am not a big fan of Iron Skin (Bowmen), since it increases defense of Bowmen, which I don't consider a very important stat; Steel Refuge (Cavalry), since it increases the defense of Cavalry, not as little value as Bowmen Defense, but there are better alternatives.

The tier specific War Strategies for the higher tiers (9-12) all seem quite good, but I will focus on Arrows of Vengeance, Defiant Charge and Unassailable first. After that probably the War Strategies for the troops I use in my pvp March Preset in order of descending amount.


This should give a basic understanding of how the Library of War works and what War Strategies you can focus on. If you have any suggestions or questions please share.

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