"Von Rosen's happiness with his second wife, Hanny, ended with the outbreak of World War II. She joined the resistance, was arrested by the Gestapo and sent to Dachau in Germany. After the war, she committed suicide[citation needed] in 1949."
What a bizarre way of phrasing things. His happiness with his second wife ended with the outbreak of the war? They say this specific thing as if they were referring to some marital breach, not seeing their time together be destroyed through arrest by a genocidally monstrous secret police agency, internment in one of its concentration camps and later suicide, probably from the trauma of surviving those two events. Yes, such a thing will destroy.... marital happiness, to say the least.
Given the subject there's a good chance that phrasing was written by someone with English as a second or third language and European 'good enough' pidgin English grammar.
If it grates on you excessively there's always the option of editing the paragraph.
What a bizarre way of phrasing things. His happiness with his second wife ended with the outbreak of the war? They say this specific thing as if they were referring to some marital breach, not seeing their time together be destroyed through arrest by a genocidally monstrous secret police agency, internment in one of its concentration camps and later suicide, probably from the trauma of surviving those two events. Yes, such a thing will destroy.... marital happiness, to say the least.