Murray had suggested to the Australian government, in June 1917, the formation of a 5th Light Horse Brigade, but this was not possible, because the Australian volunteer recruitment policy could not attract sufficient recruits at that time.
Murray havde i juni 1917 foreslået den australske regering formeringen af en femte let bereden brigade, men det var ikke muligt fordi den australske frivillige rekruttering ikke kunne tiltrække tilstrækkelig mange rekrutter på det tidspunkt.