Complex sentence: The "Hardi" class was a group of twelve French navy destroyers ("torpilleurs") laid down in 1936 to 1938 and eight ships were commissioned in 1940, with four ships never finished.
Split into simpler sentences: The "Hardi" class was a group of twelve French Navy destroyers ("torpilleurs") laid down between 1936 and 1938. Eight ships were commissioned in 1940, with four ships never finished.