Ummaru's grandparents migrated from the Kanem-Bornu empire and originally belonged to an Arab tribe from Ouaddai currently part of the Republic of Chad.
The meeting was initially scheduled to take place at Magami (Mani LG) where Shehu was to attend but because of his old age, he could not undertake the long and hazardous journey from Gwandu.
In his message, Shehu ibn fodio emphasized that Allah would make them victorious but warned them not to become corrupted like the rulers they were fighting and to avoid injustice, envy and disunity.
After the defeat of Sarkin Katsina, the Jihadists turned their attention to the eastern part of the Kingdom where they attacked a number of towns that had not been conquered.
When he settled down, he ordered an expedition against the towns of Maska and Gozaki, and brought them under control by 1810: one of the first things he did was to build a new Juma’at mosque in Katsina.
The struggles continued like this and it was at the peak of these exploits that the jihad movement for the conquest of Katsina was planned and ordered by the Shehu and Mallam Umaru naturally become the leader of the expedition.
He conquered and took over Katsina in the Islamic month of Rajab in 1806, while the sacked habe rulers fled to maradi in the present Republic of Niger.
In his desire to administer the Emirate in equity and justice, Mallam Ummarun Dallaje wrote to Sultan Muhammad Bello asking him for advice on leadership in Islam.
Sultan Muhammad Bello's reply to Mallam Umarun Dallaje was the famous literature on leadership in the caliphate known as "Usul al-Siyasa", the opening paragraph of which started thus: "Ummarun Dallaje, a man who strives in the course of Allah with sincerity and zeal may Allah help him, prolong his high position and power give him aid from His spirit and multiply the number of his supporters to write for him some words in connection with.
The principles of siyasa and the mode of conduct for a sincere man in matter connected with leadership..." Sultan Muhammad Bello went further to say: "Know, my brother that one of the most serious misfortunes that may possibly fall on a servant (of Allah) is to be a leader Amir or an emir".
The Usul al-Siyasa was written by Muhammad Bello to guide Ummarun Dallaje and successive Emirs of Katsina on matters of politics and leadership.
With numerous quotations from Hadith, Bello highlights God’s strong dislike for unjust rulers and the inevitable punishment awaiting them.
But the responsibility of the Emir to procure and safeguard the welfare of his people does not end with the spiritual and social aspects of their lives, it extends to their material and economic well-being.
The publication helped greatly in laying the political, social and economic foundation of not only in Katsina emirate, but up till now serve as a reference document on good governance world over.