What is a set of draft animals harnessed together called?

A series of novels including "Iron Knight, Silver Vase" and "Precious Sword, Golden Hairpin" includes which one filmed… A series of travel guides gives its title to which 1985 Anne Tyler novel? A service line, an attack line, a net and a ball are all features of which sport? What is a set of buildings housing soldiers in a garrison called? What is a set with no elements called in mathematics? What word names a setback or piece of misfortune, such as a military defeat? A sexagesimal number system is based on which number? A sextant is used by navigators most simply to determine what?