That role has also involved Nigerian forces in a prolonged attempt to impose a solution on Liberia's warring factions.
On 20 September 1967, it was terminated as Nigerian forces recaptured the province.
He ordered Nigerian armed forces to the three areas around Lake Chad.
This week's heavy fighting comes after months of sporadic small-scale confrontations between the country's military leaders and Nigerian forces.
Maidguri was declared secure, and Nigerian forces began setting up mortar positions in order to shell the remaining enemy compound.
We could support the Nigerian force robustly.
This prompted a barrage of answering heavy weapons fire from Nigerian forces.
It was the site of heavy artillery bombardment from the Nigerian forces stationed on its western border.
But Congressional aides, who are enthusiastic about using Nigerian forces there, complain that the American training has been too meager.
The entire operation had a series of small battles leading up to a final assault by Nigerian forces on January 12.