Which word names a group of kangaroos or of Girl Scouts?

A greengage is a plum; a greening is what fruit? A Greyhound cocktail is vodka and which tart juice? A group of rebels in Texas confronted by Mexican forces retreated into which stronghold on February 23, 1836? What is a group of cavalry, such as Troop A, B or F, called? What is a group of new rulers who take power after a coup called? Which word names a group of western African peoples and a 1975 movie co-starring boxer Ken Norton? A tragic clash between U.S. troops and the Lakota took place at which site on December 29, 1890? What kind of animal is a Guernsey?