August 14 –
Battle of Hab: The Crusaders under King
Baldwin II of Jerusalem (supported by forces of Count
Pons of Tripoli) defeat Ilghazi's army at
Ariha in
Syria. Baldwin manages to re-capture all of the Crusader castles and returns to Antioch in triumph. He stabilizes the frontiers and prevents Ilghazi from marching on Antioch.[2]
August 20 –
Battle of Brémule: King
Henry I of England defeats King
Louis VI (the Fat) of
France and his 400 knights in
Normandy. A skirmish that begins with the French launching a fierce but disordered attack, and ends with the French turning tail. Louis agrees to make peace and formally recognizes
William Adelin as duke of Normandy.
Zhu Yu, a Chinese historian, writes his book Pingzhou Table Talks (published this year), the earliest known use of
separate hull compartments in ships. Zhu Yu's book is the first to report the use of a magnetic
compass for navigation at sea. Although the first actual description of the magnetic compass is by another Chinese writer
Shen Kuo in his Dream Pool Essays (published in
1088).
^Steven Runciman (1952). A History of The Crusades. Vol II: The Kingdom of Jerusalem, pp. 123–124.
ISBN978-0-241-29876-3.
^Stratton, J.M. (1969). Agricultural Records. John Baker.
ISBN0-212-97022-4.
^McGrank, Lawrence (1981). "Norman crusaders and the Catalan reconquest: Robert Burdet and te principality of Tarragona 1129-55". Journal of Medieval History. 7 (1): 67–82.
doi:
10.1016/0304-4181(81)90036-1.
^Weber, N.
"Petrobrusians". Catholic Encyclopedia. Retrieved January 2, 2012.