When can their glory fade?

O the wild charge they made!

All the world wonder'd.

Honor the charge they made!

Honor the Light Brigade,

Noble six hundred!

In what way does the last stanza's short length contribute to the poem's meaning?

The last stanza contributed to the poem meaning as a result of its reference to the audacious action taken by the warriors (six hundred) during the war. The glory of their success was so profound that it shook the world and make the to be in awe.

The writer is now calling for them to be recognized and honoured.