Some poems may refer directly to places, events and particular times in history. This information may be clear in the poem itself but if it isn’t, you could research facts about a poem to find out these details.
Poets sometimes find the subjects or themes of their poems from source material. For instance, Lord Byron’s poem The Destruction of Sennacherib is based on a story in the Old Testament of the Bible, and knowing this can help us understand that poem more fully, even though Byron does not mention the source in the poem itself.
Denise Levertov’s poem What Were They Like? opens with the lines ‘1) Did the people of Vietnam/ use lanterns of stone?’ and goes on to ask questions about the culture of Vietnam. The second half of the poem answers these questions with references to ‘their children were killed’ and ‘bombs smashed those mirrors’, showing something terrible happened in the country.
How might the following facts about Vietnam develop our understanding of this poem?
Knowing some details about the war helps our understanding of this poem - eg if we know about napalm, the line ‘laughter is bitter to the burned mouth’ is even more powerful. Also, although the war will never be forgotten, knowing the country is flourishing again may make readers feel more hopeful when reading the poem.