score:5
Many pre-invasion aboriginal cultures managed land by burning. The effects of this were regular fuel reduction, open bush suitable for large game hunting, and the development of desired fire friendly plants.
During invasion, in the Sydney basin, guerrilla war existed until 1820, on a low scale. Actions by the owners of the land including burning European crops.
I am not aware of Europeans burning land during their wars with aboriginal peoples as an act of war. The primary mode of European invasion was economic: sheep and cattle mobbing on squats and cultivation or "closer settlement" on selections. By economically displacing aboriginal peoples forms of subsistence they destroyed the social and cultural basis of independent cultures, generally forcing aboriginal people into shanty town ghettos or apartheid type settlements. Land clearance, of scrub and trees, may have been accomplished with fire but not as an act of war (More below). After the Myall Creek Massacre, massacre in The Frontier Wars went underground, however massacre was secondary to economic displacement by land theft. As aboriginal cultures' economies weren't susceptible to burning, burning was not used by Europeans against them in their wars.
European land management has included firing bush as part of broader land clearing; however, Europeans have preferred less systematic fire managementβuntil the last 40 yearsβresulting in infrequent, predictable and catastrophic bush fires.