Battle

Close Combat IV

Enhances Infantry Lethality

Max level

5

Effect

Infantry Lethality

Plan in calculator

Research levels

Cost, base research time, power, prerequisites, and total effect at each level.

Level	Bread	Wood	Stone	Iron	Gold	Research time	Power	Requirements	Effect
1	310,000	310,000	62,000	15,000	4,000	5h 33m 20s	5,600	Academy 22 Regimental Expansion IV 1	4%
2	370,000	370,000	74,000	18,000	4,800	7h 13m 20s	11,200	Academy 23	8%
3	430,000	430,000	86,000	21,000	5,600	11h 6m 40s	16,800	Academy 24	12%
4	550,000	550,000	110,000	27,000	7,200	16h 40m	22,400	Academy 25	16%
5	1,100,000	1,100,000	220,000	57,000	14,000	1d 17h 40m	31,500	Academy 26	22.5%

Related research

Battle

Regimental Expansion IV

Increases the size of armies that can be sent in a single Expedition

Squads' Deployment Capacity

Max level 5View levels →

Battle

Infantry Upgrade IV

Enhances Infantry Health

Infantry Health

Max level 5View levels →

Values may change as the game is updated. Check current requirements before committing resources.