What is the mood in poem The Charge of Light Brigade by Lord Alfred Tennyson?

The mood in the poem "The Charge of the Light Brigade" by Lord Alfred Tennyson is one of heroism and sacrifice. The poem describes the heroic charge of the British cavalry against Russian artillery during the Battle of Balaclava in the Crimean War. Despite the futility of the charge, the soldiers display great courage and bravery in the face of certain death. The poem also conveys a sense of regret and sorrow for the loss of life, as well as a sense of admiration for the soldiers' bravery.