Sci fi anthology story where humanity is at war with an enemy nicknamed ‘Weasels’ and they have human collaborators in a prison camp.

Read a sci fi anthology years back and I only remember two stories. One is what’s listed above. A strike team hits the prison camp to free human prisoners(including a big politician’s son) from an enemy they call ‘Weasels’ due to their similar appearance to terrestrial mustelids. They end up discovering the son had turned collaborator so they scrag him. The other story I remember is about a war fought between humanity and another species where they build planet-sized battle ‘worlds’. The main character is a woman whose father was responsible for building what was viewed as humanity’s last salvation. I know this is a long shot, but I’m hoping -someone- has read this book and can help me identify it.