What is Longfellow saying about the world and life by comparing them to a battlefield and a bivouac?

Longfellow uses the metaphor of a battlefield to illustrate the struggles and challenges of life, highlighting its chaotic and often harsh nature. By comparing life to a bivouac, he suggests the temporary and transient aspect of existence, emphasizing that life is fleeting and filled with moments of rest amidst the turmoil. Together, these metaphors convey a sense of resilience and the need to find solace even in difficult circumstances. Ultimately, Longfellow reflects on the duality of life's hardships and the serene moments that provide respite.