Complex sentence: Under Effinger's leadership the Legion grew during the early 1930s and was linked to a handful of racist murders as well as attempts to appeal to a wider base of the community by arson and bomb attacks on communist bookshops.
Split into simpler sentences: Under Effinger's leadership the Legion grew during the early 1930s. It was linked to a handful of racist murders as well as attempts to appeal to a wider base of the community by arson and bomb attacks on communist bookshops.