A tetrarch was originally a ruler of one of four parts of a region. Over time the word tetrarch came to lose its original meaning and was applied to minor rulers generally, especially to the princes of Syria under the Roman emperors. Research Tetrarch
Herod (Herod the Great) was King of the Jews. He was born in about 74 BC at Ascalon, in Judea. He was the second son of Antipater the Idumean, who, being made procurator of Judea by Julius Caesar, appointed Herod to the government of Galilee. He at first embraced the party of Brutus and Cassius, but after their death reconciled himself to Antony, by whose interest he was first named Tetrarch, and afterwards king of Judea. After the battle of Actium he successfully paid court to Augustus, who confirmed him in his kingdom.
On all occasions his abilities as a politician and commander were conspicuous; but his passions were fierce and ungovernable, and his wife Mariamne, her brother, grandfather, and mother, and his own sons by her, were all put to death by him. He rebuilt the temple at Jerusalem with great magnificence, and erected a stately theatre and amphitheatre in that city. He also rebuilt Samaria, which he called Sebaste, and constructed many strong fortresses throughout Judea, the principal termed Caesarea, after the emperor.
The birth of Jesus Christ is said to have taken place in the last year of the reign of Herod, about 4 BC, the year was also signaled by the massacre of the children of Bethlehem. Herod's policy and influence gave a great temporary splendour to the Jewish nation, but he was also the first to shake the foundation of the Jewish government, by dissolving the national council, and appointing the high-priests and removing them at pleasure, without regard to the laws of succession. Research Herod
Herod Antipas was a Jewish politiciam. He was the son of Herod the Great by his fifth wife, Cleopatra, and was appointed tetrarch of Galilee on his death in 4 BC. This was the Herod who put to deathSt John the Baptist, in compliment to his wife Herodias, supposedly in revenge for his reproaches of their incestuous marriage. Having visited Rome he was accused of having been concerned in the conspiracy of Sejanus, and was stripped of his dominions, and in 39 AD was sent with his wife into exile at Lugdunum (Lyons), or, as some say, to Spain, where he died. Research Herod Antipas
The Tetrarch (Light Tank Mk VII) was a British light tank of the Second World War developed in 1937 by Vickers from previous light tanks. It had a top speed of 40 mph and as standard was armed with a 2- pounder main gun and one coaxial 7.92 mm Besamachine-gun. A close support version, the Tetrarch I CS was also produced armed with a 3-inch howitzer. Research Tetrarch
The G.A.L. Hamilcar was a British tank or vehicle carrying glider of the Second World War. It was originally designed to carry the Tetrarchtank or two universal carriers. Later, however, it was adapted to carry a great variety of military loads. It had a carrying capacity of eight long tons. Research G.A.L. Hamilcar
HMS Tetrarch was a British Triton Class patrol type submarine of 1090 tons displacement built by Vickers-Armstrong and launched in 1939 and sunk during the Second World War. She was armed with one 4-inch gun; two smaller guns and ten 21-inch torpedo tubes. She had a top speed of 15.25 knots surfaced and 9 knots submerged and carried a complement of 53. Research Tetrarch
 
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