Brian Hughes and Fergus Robson (eds.) Unconventional Warfare from Antiquity to the Present Day (Palgrave Macmillan, 2017) circa 80 Euros on Bookfinder
I borrowed this volume in hopes that it would have more clues as to the oldest source for Good King Robert’s Testament (it did not, although Alastair John MacDonald very kindly helped me with modern editions of the Scotichronicon). But I ended up reading about half of it (skipping the chapters on 20th century warfare such as Julia Welland on NATO’s unlucky intervention in Afghanistan and Raphäelle Branche on French Algeria).
The book is in reverse chronological order, but lets begin with Tim Piceu describing an outbreak of small war in Flanders as the Dutch Republic and Hapsburgs wrestled for control (p. 160, 164)
Freebooter raids generally started in a tavern in one of the above-mentioned frontier towns or in a town in the island of Walcheren (Zeeland). There a group of around a dozen men- no women are known to have been freebooters- discussed a tip received by a local informant who knew of booty. Although frebooter bands acted under the guidance of an experienced marauder, the conducteur, and some friends raided together, there seemed to be no regular composition of the crew. Everybody who had the courage could join in. If the value of the booty outweighed the risks, the group would decided to leave for enemy territory. They packed their weapons and victuals for some days, dressed themselves like peasants, and slipped past enemy posts to a hiding-place in enemy territory. The sources mention freebooters carrying a vaulting-pole to move across the many Flemish creeks, ditches, and tidal inlets. Travelling happened mostly at night and the band avoided major roads. … Most freebooters probably used their takings for living expenses, paying off debt or, to quote a Dutch civil servant, ‘to indulge for a little time in a bad and godforsaken life of drunkenness and whoring.’
You all meet in a tavern, forsooth! And every gamer agrees with that Dutch civil servant about the proper way to spend the spoils of an adventure, even if they have not read sources from the Wars of the Low Countries or the Yukon Gold Rush.