Complex sentence: Friedrich Fromm, a German officer involved in the July 20 plot to assassinate Hitler, was executed here in February 1945 for his part in the plot, even though Fromm betrayed those conspirators he knew and ordered their execution.
Split into simpler sentences: Friedrich Fromm, a German officer involved in the July 20 plot to assassinate Hitler, was executed here in February 1945 for his part in the plot. This was despite the fact Fromm betrayed those conspirators he knew and ordered their execution.