Two parties had been formed in the army, some declaring for Achillas and some for Ganymede.

Arsinoe advocated Ganymede's interests, and when, at length, the fleet was burned, she charged Achillas with having been, by his neglect or incapacity, the cause of the loss.

Achillas was tried, condemned, and beheaded.

From that time Ganymede assumed the administration of Arsinoe's government as her minister of state and the commander-in-chief of her armies.
About the time that these occurrences took place, the Egyptian army advanced into those parts of the city from which Caesar had withdrawn, producing those terrible scenes of panic and confusion which always attend a sudden and violent change of military possession within the precincts of a city.

Ganymede brought up his troops on every side to the walls of Caesar's citadels and intrenchments, and hemmed him closely in.
He cut off all avenues of approach to Caesar's lines by land, and commenced vigorous preparations for an assault.