Ibo (Igbo) Tactics for War:

The Ibo (Igbo), naturally based their tactics in the number of soldiers they have, the way they were going to fight was based in which type of unit was going to move first, they used poisoned arrows that affected the heart and the central nerve system or they will use their rifles (They preferred to use Bows and rifles as an psicologic weapon) The most units they will use were infantry that will go on the attack running against their enemies while holding their shields and when they close enough they will use their spears, some Ibo (Igbo) Soldiers didn't have any weapon so they were using hand to hand combat. Naturally the Ibo (Igbo), preferred not to fight between their own people because their armies were not that big and because they need the men for farming, if they were having trouble between other tribes on the the tribes have to give a young men and a virgin woman.

Beirish Tactics for War:

The British put their soldiers in straight lines from left to right, this soldiers wouldn't open fire until their commander say it to them. This tactic was called "Line Infantry", this tactic mainly used 3 formations during battle, during the battle they could change to a square formation so they don't get caught from the back and this tactic was useful when their armies were surpassed by the enemy, they will also use their cannons while they are moving to try to hit some enemy troops and low their morale this was also use as an psicologic weapo, when they broke the enemy lines and the enemy was retreating they will chase them with their guns holding them, and if they were able to catch any enemy they were going to use their knifes or bayonet attach to their rifle.

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https://en.m.wikipedia.org/wiki/African_military_systems_(1800–1900)

https://en.m.wikipedia.org/wiki/Line_infantry

http://www.scholastic.com/teachers/article/strategy-and-tactics-military

https://prezi.com/m/z8hoh7wjdj5d/igbo-tribe-warfare/