The British spelling of fraternization; the act of associating or bonding with others in a friendly manner, especially across group boundaries.
From 'fraternise' (British spelling of 'fraternize') with the suffix '-ation.' The British English variant of the American 'fraternization.'
British soldiers in WWI would sometimes be punished for 'fraternisation' with German troops—their willingness to share food and humanity across enemy lines terrified commanders who feared soldiers wouldn't fight the next day.
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