Why was Cleopatra band from rulig in Egypt?

If you mean why she was exiled, it was because she was in a power struggle with her brother and her brother was winning. Cleopatra had to leave Egypt under threat of death. She was trying to raise an army against her brother at the time of Caesar's arrival.
If you mean why she was exiled, it was because she was in a power struggle with her brother and her brother was winning. Cleopatra had to leave Egypt under threat of death. She was trying to raise an army against her brother at the time of Caesar's arrival.