Complex sentence: The Auxiliary Units or GHQ Auxiliary Units were specially trained highly secret units created by the United Kingdom government during the Second World War, with the aim of resisting the expected invasion of the United Kingdom by Nazi Germany.
Split into simpler sentences: The Auxiliary Units or GHQ Auxiliary Units were specially trained highly secret units created by the United Kingdom government during the Second World War. With the aim of resisting the expected invasion of the United Kingdom by Nazi Germany.