After some time, but yet while the unnatural war was still raging between the two brothers, Cleopatra, the other sister--the same Cleopatra, in fact, that had been divorced from Lathyrus at the instance of his mother--espoused the other brother.
Tryphena was exceedingly incensed against Cleopatra for marrying her husband's mortal foe, and the implacable hostility and hate of the sisters was thenceforth added to that which the brothers had before exhibited, to complete the display of unnatural and parricidal passion which this shameful contest presented to the world.
In fact, Tryphena from this time seemed to feel a new and highly-excited interest in the contest, from her eager desire to revenge herself on her sister.

She watched the progress of it, and took an active part in pressing forward the active prosecution of the war.

The party of her husband, either from this or some other causes, seemed to be gaining the day.

The husband of Cleopatra was driven from one part of the country to another, and at length, in order to provide for the security of his wife, he left her in Antioch, a large and strongly-fortified city, where he supposed that she would be safe, while he himself was engaged in prosecuting the war in other quarters where his presence seemed to be required.
On learning that her sister was at Antioch, Tryphena urged her husband to attack the place.

He accordingly advanced with a strong detachment of the army, and besieged and took the city.