Varth was the squadleader in Amaram's army who placed Tien in harm's way. Kaladin cursed him for placing his brother in that position.
"You bastard," Kaladin hissed. "You put them in front."
"You work with what you have," Varth said, nodding to his team, then pointing at a fortified position. "If they give me men who can fight, I'll find another use for them." He hesitated as his team marched away. He seemed regretful. "Gotta do what you can to stay alive, son. Turn a liability into an advantage whenever you can."