That wouldn't surprise me, though there's both supporting and opposing historic examples for that.

Like the colonization of Africa. While some areas like Ethiopia held out longer than others, Europe took most of Africa without disease. India was also subjugated, as well as Malaysia. I'm not really sure what the story was for Australia, though suspect it might have been more like the Americas.

Or there's China and Japan where Europe had the upper hand in dealings but weren't able to essentially make China or Japan colonies under their control.