The Working Party, c.1917 by Richard Tennant Cooper. Date painted: c.1918. During WW1 all front line regiments detailed working parties to undertake tasks such as repairs and extensions to the trench systems, reconnaissance and recovery of the dead and wounded. Any work in the open meant that they had to operate at night to avoid being picked off by enemy marksmen. But it remained a risky operation as the dazzling white light of flares could still suddenly expose them.