“Never lose sleep over your husband, Katrina. He has a knack to defy difficulties.”, Eragon said. Katrina had contacted him and explained about Galbatorix's counter attack. Eragon was embarrassed to have heard of the Varden's struggle and victory from Katrina. It was his duty to scry and learn about the happenings of the Varden on a day-to-day basis, since the Varden were in no position to contact him when need arose. But he had spend his time training Indra, making fairths and practising with Arya and had forgotten to keep an eye on the Varden for the past four-five days.
Katrina nodded as if to say 'I know' and said, “But Galbatorix grows desperate.”
It was a very true observation. It was, indeed, desperate of Galbatorix to send armies from three directions to recapture Teirm. And Eragon knew quite well that victory wouldn't have been this easy if the Varden were ignorant of the marching armies. Somehow they had been notified and they had won the battle.