The sacred power of motherhood, the wildebeest used its horns to kill the wild dog to save the child.

Mother’s love is more sacred than anything and has no equal. same in animals.
Here we see the great power of motherly love.
As a hunting dog, with a small body and solitary prey, it cannot hunt large animals.
And it saw the target was a mother and baby wildebeest pair.

African Wild dog fighting Wildebeest | African Wild dog figh… | Flickr
With its intelligence, it decided to use the strategy of distracting the mother wildebeest and capturing the baby wildebeest.
And its strategy was right, the mother wildebeest has been tricked and her baby is caught in the sharp teeth of the wild antelope.

Wildebeest Are Left Behind To Become Prey For Wild Dogs | Africa Animals -  YouTube
Realizing that something was wrong, the baby was nowhere to be found, the mother wildebeest turned around and saw that the baby was being bitten by a wild dog, it got mad and used its horns as a weapon to threaten the jackals, butting them continuously.
Seeing the mother antelope getting angry, the wild dog was scared and ran away to save his life.