President Muhammadu Buhari on Tuesday, 26 of January 2021 relief all the Service Chief of their duty including the Chief of Army Staff and appointed new Service Chiefs in replacement.

In a public address published by the presidency, Buhari said 
I have accepted the immediate resignation of the Service Chiefs, and their retirement from service. I thank them all for their overwhelming achievements in our efforts at bringing enduring peace to Nigeria, and wish them well in their future endeavours. 
And he replaced them with new appointees below 

I have also appointed new Service Chiefs, to replace the retired officers: 

Major-General Leo Irabor, Chief of Defence Staff

Major-General I. Attahiru, Chief of Army Staff

Rear Admiral A.Z Gambo, Chief of Naval Staff

Air-Vice Marshal I.O Amao, Chief of Air Staff.
It appears Nigerians are not satisfied with Major General I. Attahiru as the new Chief of Army Staff, as Nigerians believe the new COAS incompetence for the job is beyond the roof.

A tweet thread published by Punch gives an account of the new COAS incompetency for the job
1.He was a Theatre Commander of Operation Lafiya Dole.

2. In December 2017, he was removed from that position after he failed to capture Boko Haram leader, Abubakar Shekau.

3. In June 2017, barely a month after Attahiru took over, Boko Haram insurgents attacked Maiduguri, the Borno state capital.

4.  Attahiru was removed after his time witnessed increased activity of the terror group.

5. In his final speech as Theatre Commander, Attahiru claimed his team killed five Boko Haram commanders and neutralised 70 terrorists while he was at the helm.

Nigerian activist for #EndSARS and #BringBackOurGirls, Aisha Yesufu tweeted 
Below are other selected tweets by Nigerians