Il libro "I rivali dell'Acadia - Harriet Vaughan Cheney" narra le vicende del governatore generale della provincia francese dell'Acadia, M. Razilly, che affidò l'amministrazione a D'Aulney de Charnisy e a St. Etienne, signore di La Tour. Il primo venne nominato luogotenente della parte occidentale della colonia, il secondo della parte orientale. Il libro analizza le rivalità e i conflitti tra questi due personaggi, che si contesero il controllo della provincia in un periodo di grande instabilità politica e sociale. La storia si svolge su uno sfondo di lotte per il potere, intrighi di corte e battaglie sanguinose tra francesi e inglesi. I lettori potranno immergersi in un'epoca di grandi cambiamenti e scoprire le storie di personaggi affascinanti e complessi, che hanno lasciato un segno indelebile nella storia dell'Acadia.

The provided information does not describe a vehicle, device, or machine. It describes a historical period and characters from the book "The Rivals of Acadia" by Harriet Vaughan Cheney. Therefore, I cannot provide a detailed introduction about a vehicle/device/machine.

However, I can offer a summary of the historical context and the key figures mentioned in the provided information.

"The Rivals of Acadia" is a historical novel that focuses on the early French settlements in Acadia, now known as Nova Scotia and New Brunswick in Canada. The text mentions two prominent figures: M. Razilly and his two lieutenants, D'Aulney de Charnisy and St. Etienne, lord of La Tour. Razilly was the governor-general of Acadia, responsible for overseeing the colony's development and administration. To manage the vast territory, he divided it between his two lieutenants: D'Aulney de Charnisy was given the western part of the colony, and St. Etienne, lord of La Tour, received the eastern region. This division, however, eventually led to a bitter rivalry between the two men, with each vying for power and control over Acadia's resources.

The rivalry between D'Aulney and La Tour deeply affected the early development of Acadia. Their conflict involved disputes over land ownership, trade routes, alliances with indigenous peoples, and the control of key forts. Ultimately, their struggles contributed to the instability and vulnerability of the French colony, impacting its progress and future. "The Rivals of Acadia," as a historical novel, delves into the complexities of this rivalry and its consequences, shedding light on a crucial period in the history of Acadia and the early French colonial ventures in North America.