torch
The torch not only symbolizes the passing of responsibility to the next group of soldiers, but also a symbol of life and death. Fire is typically a symbol of life, so those who passed in the battle no longer has the light, but their death can give motivation and, therefore, life to the next.
larks
"The lark is prominently associated with the break of day and the start of the spring season. Larks are known for their beautiful contributions to the “dawn chorus” and as such represent hope, light, and joy" (World Birds, Joy of Nature).
This might suggest that the Lark could have posed as a potential symbol of hope and light in this dark time. According to the source, if Larks represent daybreak or are associated with the season of Spring, it is possible to infer that they could represent what people often associate with daybreak or the season of Spring. Fresh starts, new days, new beginnings, new life, etc. Maybe pointing to the fact that the poem symbolizes the idea and conveys the meaning that there will be a new day or a new time. The world will move on from this.
larks
"The lark is prominently associated with the break of day and the start of the spring season. Larks are known for their beautiful contributions to the “dawn chorus” and as such represent hope, light, and joy" (World Birds, Joy of Nature).
This might suggest that the Lark could have posed as a potential symbol of hope and light in this dark time. According to the source, if Larks represent daybreak or are associated with the season of Spring, it is possible to infer that they could represent what people often associate with daybreak or the season of Spring. Fresh starts, new days, new beginnings, new life, etc. Maybe pointing to the fact that the poem symbolizes the idea and conveys the meaning that there will be a new day or a new time. The world will move on from this.