One of these locales was simulated in the Bull Rin
One of these locales was simulated in the Bull Ring at Etaples. The Nahkampfmesser and the so-called "French Nail" were designed for use in these locations, which are preserved by museums at Dixmude and Sanctuary Wood. A ritual sometimes called the "morning hate" was carried out daily in these locales. A force called the Patricias devised a way to target these locations stealthily in raids, a signature of the Canadian Corps. Between the battle of Aigne and the Battle of Yser, a "race to the sea" began the most famous usage of these locales, which lend their name to a gangrenous swelling of the foot. The creation of these things is sometimes called sapping, and the command "over the top" was given to send men from these structures into "No Man's Land". For 10 points, name these earthen structures along the Western Front of World War I.
One of these locales was simulated in the Bull Ring at Etaples.
{trench}es [prompt “World War I battlefields” or similar answers]