An annulment is when the court declares the marriage to be a nullity (legally invalid).  In Maryland, proving the grounds for an annulment is very difficult.  In order to obtain an annulment, a party typically must prove fraud, misrepresentation, or imposition by clear and satisfactory proof.  The mere fact that the parties only remained together for a short period of time after the parties were married will not prove the grounds for an annulment.