Spatial distribution of stellar streams in the merger case (top row) and reference case (bottom row) at four different timesteps: 2.00 Gyr (before the merger), 2.22 Gyr (shortly after the satellite’s first crossing of the Milky Way disk), 3.00 Gyr, and 5.00 Gyr. Each colour represents a different stellar stream. The black cross marks the centre of mass (COM) of the Milky-Way-type galaxy, and the red cross marks the COM of the satellite galaxy (only in the merger case). All panels show projections in the x – z plane, with coordinates centred on the Milky Way COM.