Yellow Rain is a work of art which ventures into the new or often unexplored genre – ‘documentary poetics’. Documents such as historical records, newspaper articles and interview recordings are combined with poetry to form a documentary poem. Such type of art is called as ‘collage poem’. Mai Der Vang uses this powerful genre to come out with the silenced history of Hmong─an ethnic minority group who suffered because of biological warfare known as ‘yellow rain’. She narrates the sad plight of Hmong in a poetic lore combined with evidences. She examines the official documents to understand the hand of oppressor in the usage of biological warfare against the Hmong. She brings forth the miserable lot of a marginalized group