Senusret I was the second pharaoh

Pharaoh

Pharaoh is a title used in many modern discussions of the ancient Egyptian rulers of all periods. The title originates in the term "pr-aa" which means "great house" and describes the royal palace...

 of the Twelfth Dynasty

Twelfth dynasty of Egypt

The twelfth dynasty of ancient Egypt is often combined with Dynasties XI, XIII and XIV under the group title Middle Kingdom.-Rulers:Known rulers of the twelfth dynasty are as follows :...

 of Egypt

Ancient Egypt

Ancient Egypt was an ancient civilization of Northeastern Africa, concentrated along the lower reaches of the Nile River in what is now the modern country of Egypt. Egyptian civilization coalesced around 3150 BC with the political unification of Upper and Lower Egypt under the first pharaoh...

. He ruled from 1971 BC to 1926 BC, and was one of the most powerful kings of this Dynasty. He was the son of Amenemhat I

Amenemhat I

Amenemhat I, also Amenemhet I, was the first ruler of the Twelfth Dynasty . He ruled from 1991 BC to 1962 BC...

 and his wife Nefertitanen. His wife and sister was Neferu. She was also the mother of the successor Amenemhat II

Amenemhat II

Nubkhaure Amenemhat II was the third pharaoh of the Twelfth Dynasty of Ancient Egypt. Not much is known about his reign. He ruled Egypt for 35 years from 1929 BC to 1895 BC and was the son of Senusret I through the latter's chief wife, Queen Nefru. His queen is not known; although recently a...

. Senusret I was known by his prenomen, Kheperkare, which means "the Ka of Re is created."

He continued his father's aggressive expansionist policies against Nubia

Nubia

Nubia is a region along the Nile river, which is located in northern Sudan and southern Egypt.There were a number of small Nubian kingdoms throughout the Middle Ages, the last of which collapsed in 1504, when Nubia became divided between Egypt and the Sennar sultanate resulting in the Arabization...

 by initiating two expeditions into this region in his 10th and 18th Years and established Egypt's formal southern border near the second cataract

Cataracts of the Nile

The cataracts of the Nile are shallow lengths of the Nile between Aswan and Khartoum where the surface of the water is broken by many small boulders and stones protruding out of the river bed, as well as many rocky islets. Aswan is also the Southern boundary of Upper Egypt...

 where he placed a garrison and a victory stele

Stele

A stele , also stela , is a stone or wooden slab, generally taller than it is wide, erected for funerals or commemorative purposes, most usually decorated with the names and titles of the deceased or living — inscribed, carved in relief , or painted onto the slab...

.