Defense Boost

The Defense Boost is a feature of some buildings and items to increase the defense value of units defending the city by a certain percentage. The defense boost can also be activated from the Friends Tavern by paying for it with Tavern Silver.

The defense boost only benefits the defending units, offensive units will not be affected. To increase the stats of the offensive units players may use the attack boost.

When having multiple defense boosts, either from buildings or from items, those percentages are stacked. Then the unit's base defense value is increased by the result.

Defense Boost Providers for Defending Army

The following sources increase the defense values of the players troops when they are used for defending. This applies only for the City Defense when the player is attacked by another player of their neighborhood.

Great Buildings

Some of the Great Buildings offer a Fierce Resistance or Advanced Tactics bonus, which beside increasing the defense value also increases the attack value of the defending units.

Building		Fierce Resistance and Advanced Tactics
	Deal Castle	Provides Fierce Resistance Provides +3% defense boost at level 1 and +30% defense boost at level 10. After level 10 +1% defense boost is gained after every second level.
	Saint Basil's Cathedral	Provides Fierce Resistance Provides +3% defense boost at level 1 and +30% defense boost at level 10. After level 10 +1% defense boost is gained after every second level.
	Terracotta Army	Provides Advanced Tactics Provides +2% defense boost at level 1 and +20% defense boost at level 10. After level 10 +1% defense boost is gained after every second level. What makes the Terracotta Army different is that the stats of the offensive army are also increased by the same amount.

Special Buildings

Building		Defense Boost
	The Appleton Cottage	Provides from +10% to +18% defense boost depending on the buildings age. The Appleton Cottage is one of the three options when reaching level 7 with the September Cottage.
	Athlete Living Quarters	Provides +7% defense boost. The boost value remains constant through the ages.
	Classical Garden Pool	Provides +4% defense boost when adjacent to one other different buildings from the Classical Garden Set. The boost values remain constant through the ages.
	Druid Willow	Provides +3% at level 1 or +6% at level 2 defense boost, when adjacent to at least two other building from the Celtic Forest Set.
	Elephant Fountain	Provides from +3% to +9% defense boost when adjacent to at least three other building from the Indian Fountain Set. The boost value depends on the buildings age.
	Garden Ruins	Provides +2% defense boost when adjacent to one other different buildings from the Royal Garden Set or +5% defense boost when adjacent to two different buildings from the set. The boost values remain constant through the ages.
	Monastery	Provides +20% defense boost.
	Nishikigoi Pond	Provides +2% defense boost when adjacent to two other different buildings from the Cherry Garden Set or +5% defense boost when adjacent to three different buildings from the set. The boost values remain constant through the ages. At level 2 the Nishikigoi Pond provides +5% defense boost when adjacent to two other buildings from the set or +12% defense boost when adjacent to three.
	Pond of Fall	Provides from +6% to +11% defense boost depending on the buildings age.
	Ritual Flame	Provides +8% defense boost at level 1. At level 2 +12% defense boost is provided. The boost value remains constant through the ages.
	Royal Guard Post	Provides +1% to +2% defense boost depending on the buildings age.
	Smörgåsbord Feast	Provides +2% defense boost when adjacent to two other different buildings from the Winter Village Set or +5% defense boost when adjacent to three different buildings from the set. The boost values remain constant through the ages.
	Sundial Spire	Provides from +2% to +7% defense boost depending on the buildings age.
	Tigers' Den	Provides +5% defense boost. The boost value remains constant through the ages.
	Watchfire	Provides +4% defense boost at level 1. At level 2 +6% defense boost is provided. The boost values remain constant through the ages.
	Winter Spire	When upgraded to level 5 or more starts to provides +3% to +14% defense boost depending on the buildings level and the age.
	Primrose Bloom	Provides +6% defense boost to the defending army.

Military Buildings

From the Contemporary Era and onward some of the regular military buildings also provide defense boost.

	Building	Boost	Era
	Air Defense Factory	+4%	Contemporary Era
	Missile Site	+4%	Contemporary Era
	Anti-Materiel Range	+4%	Tomorrow Era
	Microwave Blaster Factory	+4%	Tomorrow Era
	Satellite Uplink Center	+5%	Future Era
	Rail Gun Range	+5%	Future Era
	Battle Fortress Factory	+6%	Arctic Future
	Plasma Range	+7%	Arctic Future
	C.R.A.B. Lab	+6%	Oceanic Future
	Turturret Dock	+7%	Oceanic Future
	Warrior Monk School	+6%	Virtual Future

Items

Defender boost items can be gained from the boost crate, events, Daily Challenges and Incidents. Items can only provide temporary defense boost. The boost effect from the items do stack up, that means players may use multiple boost items at once.

Item		Defense Boost
	Small Defender Boost	Provides +10% defense boost for 8h.
	Medium Defender Boost	Provides +20% defense boost for 8h.
	Large Defender Boost	Provides +30% defense boost for 8h.

Friends Tavern

A temporary defense boost can be activated in the Friends Tavern with Tavern Silver.

Item	Cost	Defense Boost
	1,000	Activates +10% defense boost for 24h.
	2,500	Activates +20% defense boost for 48h.
	7,000	Activates +30% defense boost for 72h.

Defense Boost Providers for Attacking Army

The following sources increase the defense values of the players troops when they are used for attacking. This applies for attacking other players in the neighborhood, for attacking in the guild expedition encounters, for attacking on the GvG Maps, for fights on the Continent Maps, for fights in the Daily Challenges or for fights in the Guild Battlegrounds.

Great Buildings

Some of the Great Buildings offer a Military Boost or Advanced Tactics bonus, which beside increasing the attack value also increases the defense value of the attacking units.

	Building	Military Boost and Advanced Tactics
	Castel del Monte	Provides Military Boost Provides +3% defense boost at level 1 and +30% defense boost at level 10. After level 10 +1% defense boost is gained after every second level.
	Cathedral of Aachen	Provides Military Boost Provides +3% defense boost at level 1 and +30% defense boost at level 10. After level 10 +1% defense boost is gained after every second level.
	Statue of Zeus	Provides Military Boost Provides +3% defense boost at level 1 and +30% defense boost at level 10. After level 10 +1% defense boost is gained after every second level.
	Terracotta Army	Provides Advanced Tactics Provides +2% defense boost at level 1 and +20% defense boost at level 10. After level 10 +1% defense boost is gained after every second level. What makes the Terracotta Army different is that the stats of the defending army are also increased by the same amount.

Special Buildings

	Building	Defense Boost
	Ancient Obelisk	Provides from +2% to +6% defense boost to the attacking army, depending on the buildings level.
	Druid Temple	Provides from +14% to +28% attack boost on the highest level, depending on the buildings age.
	Druid Willow	Provides +3% at level 1 or +6% at level 2 defense boost to the attacking army, when adjacent to at least two other building from the Celtic Forest Set.
	Gate of the Sun God	At level 2 it provides +4% defense boost to the attacking army.
	Hippodrome Carceres	Provides +8% to 17% defense boost to the attacking army at level 6, depending on the buildings age.
	House of Horrors	Provides +2% to 7% defense boost to the attacking army at level 6 and +6% - 14% at level 7, depending on the buildings age.
	Ochre Yard	Provides +8% defense boost to the attacking army.
	Olive Grove	Provides +8% defense boost to the attacking army when chained to a Terracotta Vineyard.
	Olympic Treasury	When upgraded to level 10 it provides +10% to +24% defense boost to the attacking army, depending on the buildings age.
	Road to Victory	Provides +5% defense boost to the attacking army when chained to a Statue of Honor.
	Rousioi Track	Provides +3% defense boost to the Sphendone and Carceres, when chained to those.
	Sentinel Outpost	Provides from +2% to +4% defense boost to the attacking army, depending on the buildings level.
	Wonder Wheel	Provides +18% to 32% defense boost to the attacking army, depending on the buildings age.

See also

Defensive Army
Offensive Army
Attack Boost
Boost Crate