This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
WWImontage. en Montage for WWI article Top Trenches Image ThebadlyshelledmainroadtoBapaume Trenches on the Western Front Left Upper Image AlbatDIII German Albatros III biplane fighters of Jasta at Douai France Left Lower Image Vickersmachineguncrewwithgasmasks Vickers machine gun crew with gas masks Right Upper File British