Aggravated by chaotic elections, the first coup in Nigeria led by idealistic young Nigerians in the military would lead to events that would lead to the war.
The coup, although not an ethnic coup, was seen as an Igbo coup because the coup comprised mostly of Igbos and most of people killed in the coup were northerners, except for one Igbo officer.
Many have argued that if not for the inexperience of the coupers, more officers would have been killed not just northerners.
But aggravated by pictures of the northern officers killed, the Hausas and other northerners killed 30,000 Igbos in the north.
This massacre led to a mass movement of Igbos back to their hometown in the southeast lead to Ojukwu declaring independence.