ABSTRACT We investigate the contribution of sub-Chandrasekhar mass Type Ia supernovae to chemical enrichment Gaia Sausage galaxy, progenitor a significant merger event in early life Milky Way. Using combination data from Nissen & Schuster, GALactic Archaeology with HERMES (GALAH) Data Release 3 [with 1D non-local thermal equilibrium (NLTE) abundance corrections], and Apache Point Observator...