The chief of the defence staff in Gambia has been dismissed for physical assaults on soldiers and using abusive and insulting language.
President Jammeh took power in a coup and won elections in 2001
The sacking of Capt Assan Sarr is the latest of several recent high profile dismissals in the country.
A presidential statement said he had violated the military code.
The statement added that his alleged behaviour was tantamount to subverting military discipline and decency, which could not be accepted in the army.
It also spoke of his "degrading and humiliating treatment of soldiers".
The BBC's Lamin Cham in the capital, Banjul, says the decision to give reasons for his dismissal is a clear departure from the past.
Capt Sarr's replacement has been named as Ndure Cham.
Earlier this month, Gambian police arrested three leading opposition figures in what the government said was part of a probe into a national security threat.
Halifa Sallah, Omar Jallow and Hamat Bah are members of the National Alliance for Democracy and Development, an opposition coalition.
Mr Sallah and Mr Jallow have been charged with sedition and Mr Bah with possession of an unauthorised document.
President Yahya Jammeh is seeking re-election next year.
He came to power in a coup in 1994 and won a second term in office in October 2001.