(c. 1795–1550 BC)
The term used by Egyptologists to designate the period between the end of Dynasty 12or, according to some, the middle of Dynasty 13 until the accession of Dynasty 18. During this period, the kingship was weak and divided, and Egypt was occupied by the Hyksos until they were driven out by the princes of Thebes.
Historical Dictionary Of Ancient Egypt by Morris L. Bierbrier
Ancient Egypt. A Reference Guide. EdwART. 2011.