Koulamallah campaigned in different times and places as a member of the Baguirmi nobility, a radical socialist leader, or a militant Muslim fundamentalist.
Sahoulba succeeded Lisette as President of the Provisional Government, forming a government of which he was the only southern Chadian.
This exclusion of the south generated high resentment, and brought Koulamallah to ally himself with Lisette against Sahoulba; as a result, a new motion of no confidence was approved with 35 votes against 30, and a new government was formed by Koulamallah on 13 March 1959.
The first day he brought all the ministers, Muslims or non-Muslims, to the mosque to pray thanks; and established Arabic would be the working language of the government.
Also for this his government survived only eleven days, as yet another motion of no confidence overthrowed the government with 42 votes out of 52.
Following this he was again relegated to the opposition, while the PPT, now led by François Tombalbaye, who became the first president of indipent Chad on 11 August 1960.
In January 1962 all political parties were banned, except the PPT; and in September 1963 all the opposition leader were arrested.
Koulamallah escaped with the help of his Baguirmian relatives, crossing the Chari River and passing in Cameroon.
But only a few days later he was arrested by the Cameroonian authorities, and extradited to Chad where he was immediately jailed.
He remained in prison till 1971, and again from 1972 till 1975, when Tombalbaye was overthrown by a coup.
He died in 1995.