Hearts of iron 4 supply lines

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This one is the most versatile variant that provides reinforcement for support ships and aircraft carriers. Therefore, you do not have to hurry when it comes to this variant. This technology is a must-get for players who value power above anything else and who like dominating over the opponent n terms of firepower and numbers, It should be noted that building an appropriate fleet for this purpose may take a while.

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Of course, submarines and aircraft carriers also receive bonuses, but they are not as high as ones for battleships. Without special conditions and actions, you conduct warfare basing on devastating firepower and resistance of your units. In the case of this doctrine, you deal with reinforcement of mass military actions and exhaustion warfare. Conventionally for the doctrines, also level of organization of individual units has been raised, as well as bonuses that you receive from carrying out commands issued to individual types of ships.

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In the case of specific technologies, you will receive bonuses to detection and neutralization of various threats, which will make it much easier to control see basins. In the case of this doctrine, you will be receiving most profits in connection with maintenance of liners.