Refresh my memory please-Beginning of Memory of Light

[Kristina]

Just started Memory of Light. Turns out there are some holes in my memory :P I went to a wheel of time wikki and read the summaries of the other books, but one thing I can't find- at the beginning of the new book, Telmanes and some of the band are fighting in Camelyn. What was happening at the end of the last book that Camelyn is full of Trollocks and fire?

[Terry]

Trollocs invaded at the end of Towers of Midnight through a Waygate.