<prompt> Tlatša polelwana ye e latelago: 2 CERs lineage is formally traced to 4th Field Company 4 Fd Coy Royal Australian Engineers, which was raised in the early stages of World War I. Leina la 7th Field Company 7 Fd Coy ka 1915, yuniti e be e tumile ka tirelo ya yona ka France le Belgium ka Ntwa ya Somme, Menin Road le ka Hindenburg Line. Nakong ya Ntwa ya II ya Lefase, 7 Fd Coy e ile ya lwa le Majapane kua  <response>: Kokoda le Bougainville. 