Conversation so far:
why was there a war between nigeria and biafra?
The conflict between Nigeria and Biafra resulted from political, economic, ethnic, cultural and religious tensions which preceded Britain's formal decolonization of Nigeria from 1960 to 1963.
how long did the war between Nigeria and Biafra last?
The war lasted 2 years, 6 months, 1 week and 2 days, from 6 July 1967 until 15 January 1970.
who won the war between Nigeria and Biafra?
Nigeria
how many casualties and losses were there in the war between Nigeria and Biafra?
During the two and half years of the war, there were about 100,000 overall military casualties, while between 500,000 and 2 million Biafran civilians died of starvation.

Question: did the United States get involved?
Self-contained rewrite: did the United States get involved in the war between Nigeria and Biafra?