There are still no independently corroborated figures for the huge numbers said to have been killed in Baga, on the shores of Lake Chad in the far north of Borno State.
But defence spokesman Chris Olukolade said in a statement issued late yesterday that the description of the assault as "the deadliest" in a conflict that has claimed more than 13,000 lives since 2009 was "quite valid".
"The attack on the town by the bloodhounds and their activities since January 3rd, 2015, should convince well-meaning people all over the world that Boko Haram is the evil all must collaborate to end, rather than vilifying those working to check them," he said.
Soldiers have complained of a lack of adequate weapons and even refused to deploy to take on the better-armed rebels, who want to create a hardline Islamic state in northeast Nigeria.
With elections set for next month, Nigeria's government has also been accused of playing politics with the insurgency, as most of the areas worst affected by the violence are main opposition strongholds.
But Olukolade said: "The Nigerian military has not given up on Baga and other localities where terrorist activities are now prevalent.
The military and government often makes such statements, without giving specific details, yet there are reports of attacks on an almost daily basis.
Yesterday, two explosions rocked northeast Nigeria, including one at a crowded market in the Borno State capital, Maiduguri, by a girl suicide bomber thought to be just 10. Nineteen people were killed.
The Baga attack, which local officials said forced at least 20,000 people to flee, also overran the headquarters of the Multinational Joint Task Force made up of troops from Nigeria, Niger and Chad.
There was no credible estimate yet of the numbers of civilians killed, after huge numbers cited locally, he added.
