I just got to read about the much talked about Aburi accord and It sounded as if it was all about power. How could breakdown of the accord have caused the civil war?

Aburi accord is as follows:
"Members agree that the legislative and executive authority of the Federal Military Government should remain in the Supreme Military Council, to which any decision affecting the whole country shall be referred for determination provided that where it is possible for a meeting to be held the matter requiring determination must be referred to military governors for their comment and concurrence.
Specifically, the council agreed that appointments to senior ranks in the police, diplomatic, and consular services as well as appointment to superscale posts in the federal civil service and the equivalent posts in the statutory corporation must be approved by the Supreme Military Council.
The regional members felt that all the decrees passed since January 15, 1966, and which detracted from previous powers and positions of regional governments, should be repealed if mutual confidence is to be restored.

In response to the accord, the federal government promulgated Decree No. 8, which was mainly an embodiment of the accord. The accord finally broke down because of differences of interpretation on both sides. This led to the outbreak of Nigerian Civil War.[5]