Answer:
valley of Death
Explanation:
The fate of the Light Brigade was their riding into the valley of Death. Seeing that the British soldiers were few in number and ill-equipped when compared to the Russian forces they went to fight against in 1854, we can say that they were literally moving into the valley of Death.
This confrontation led to the exposure of 600 of them to the attack of the Russian forces. 195 soldiers still had their horses after the first attack, but they lost 118 men in death. 127 of the men were wounded while 60 soldiers were imprisoned.
Emily Dickinson was writing about how instead of organized religion she prefers to stay home and feel the god in herself, in a way. So when she explains this she says "an Orchard" speaking presumably of a space in her own house, and "for a dome" to contrast it with the kind of grand architecture displayed in churches.
