ww1 had more deaths than ww2, and it was inter-capitalist rivalry fighting over who would get control over the colonies. Took place before fascism as a term was even coined.

British imperialism killed millions in India, africa, asia. US imperialists genocided an entire continent, and the nazis explicitly took it as their model: trying and failing to acheive in eastern europe, what the US’s capitalist democracy already carried out in North america.

https://dessalines.github.io/essays/us_atrocities.html