The poem "Dreamers" centered on what foot soldiers thought about during times of enemy fire in World War I. During this war, Siegfried Sassoon was a soldier, and he drew from his experiences to write the poem.
"Dreamers" has 14 lines, and it is a sonnet that carries a rhythm scheme. More specifically, it is a Petrarchan sonnet and not a Shakespearean sonnet. This type of poem consists of an eight-line stanza that introduces the poem's topic, similar to how the first few chapters of a book introduce the topic and the characters, and then a six-line stanza that works to develop the poem's topic.