Question: When did the military branch that the Louisbourg Grenadiers belonged to invade Saint Barthélemy?

full_context: Document 1: Saint Barthélemy: Agricultural production on the island is difficult given the dry and rocky terrain, but the early settlers managed to produce vegetables, cotton, pineapples, salt, bananas and also fishing. Sweet potato is also grown in patches. The islanders developed commerce through the port of Gustavia. Duty-free port attractions, retail trade, high-end tourism (mostly from North America) and its luxury hotels and villas have increased the island's prosperity, reflected in the high standard of living of its citizens.
Document 2: Northern Seven Years' War: British Prime Minister William Pitt's focus on the colonies for the 1758 campaign paid off with the taking of Louisbourg after French reinforcements were blocked by British naval victory in the Battle of Cartagena and in the successful capture of Fort Duquesne and Fort Frontenac. The British also continued the process of deporting the Acadian population with a wave of major operations against Île Saint-Jean (present-day Prince Edward Island), the St. John River valley, and the Petitcodiac River valley. The celebration of these successes was dampened by their embarrassing defeat in the Battle of Carillon (Ticonderoga), in which 4,000 French troops repulsed 16,000 British.
Document 3: Saint Barthélemy: Saint-Barthélemy has a marine nature reserve, known as the Reserve Naturelle that covers 1.200 ha, and is divided into 5 zones all around the island to form a network of protected areas. The Reserve includes the bays of Grand Cul de Sac, Colombier, Marigot, Petit Cul de Sac, Petite Anse as well as waters around offshore rocks such as Les Gross Islets, Pain de Sucre, Tortue and Forchue. The Reserve is designed to protect the islands coral reefs, seagrass and endangered marine species including sea turtles. The Reserve has two levels of protection, the yellow zones of protection where certain non-extractive activities, like snorkeling and boating, are allowed and the red zones of high protection where most activities including SCUBA are restricted in order to protect or recover marine life. Anchoring is prohibited in the Reserve and mooring buoys are in place in some of the protected bays like Colombier
Document 4: Saint Barthélemy: As the terrain is generally arid, the hills have mostly poor soil and support only cacti and succulent plants. During the rainy season the area turns green with vegetation and grass. The eastern part of the island is greener as it receives more rainfall. A 1994 survey has revealed several hundred indigenous species of plants including the naturalized varieties of flora; some growing in irrigated areas while the dry areas are dominated by the cacti variety. Sea grapes and palm trees are a common sight with mangroves and shrubs surviving in the saline coastal swamps. Coconut palm was brought to the island from the Pacific islands. Important plants noted on the island are:
Document 5: Louisbourg Grenadiers: The Louisbourg Grenadiers was a temporary unit of grenadiers formed by General James Wolfe in 1759 to serve with British Army forces in the Quebec campaign of the Seven Years' War.
Document 6: Saint Barthélemy: Marine mammals are many, such as the dolphins, porpoises and whales, which are seen here during the migration period from December till May. Turtles are a common sight along the coastline of the island. They are a protected species and in the endangered list. It is stated that it will take 15–50 years for this species to attain reproductive age. Though they live in the sea, the females come to the shore to lay eggs and are protected by private societies. Three species of turtles are particularly notable. These are: The leatherback sea turtles which have leather skin instead of a shell and are the largest of the type found here, some times measuring a much as 3 m (average is about 1.5 m) and weighing about 450 kg (jellyfish is their favourite diet); the hawksbill turtles, which have hawk-like beaks and found near reefs, generally about 90 cm in diameter and weigh about 60 kg and their diet consists of crabs and snails; and the green turtles, herbivores which have rounded heads, generally about 90 cm in diameter and live amidst tall sea grasses.
Document 7: Norfolk Island: Norfolk Island has 174 native plants; 51 of them are endemic. At least 18 of the endemic species are rare or threatened. The Norfolk Island palm (Rhopalostylis baueri) and the smooth tree-fern (Cyathea brownii), the tallest tree-fern in the world, are common in the Norfolk Island National Park but rare elsewhere on the island. Before European colonization, most of Norfolk Island was covered with subtropical rain forest, the canopy of which was made of Araucaria heterophylla (Norfolk Island pine) in exposed areas, and the palm Rhopalostylis baueri and tree ferns Cyathea brownii and C. australis in moister protected areas. The understory was thick with lianas and ferns covering the forest floor. Only one small tract (5 km2) of rainforest remains, which was declared as the Norfolk Island National Park in 1986.
Document 8: Northern Seven Years' War: All of Britain's campaigns against New France succeeded in 1759, part of what became known as an Annus Mirabilis. Fort Niagara and Fort Carillon on 8 July 1758 fell to sizable British forces, cutting off French frontier forts further west. On 13 September 1759, following a three-month siege of Quebec, General James Wolfe defeated the French on the Plains of Abraham outside the city. The French staged a counteroffensive in the spring of 1760, with initial success at the Battle of Sainte-Foy, but they were unable to retake Quebec, due to British naval superiority following the battle of Neuville. The French forces retreated to Montreal, where on 8 September they surrendered to overwhelming British numerical superiority.
Document 9: Battle of the Plains of Abraham: Battle of the Plains of Abraham Part of the Seven Years' War French and Indian War The Death of General Wolfe by Benjamin West. Oil on canvas, 1770 Date 13 September 1759 Location Quebec City Result Decisive British victory; British occupation of Quebec City Belligerents Great Britain France French Canada Commanders and leaders James Wolfe † Robert Monckton John Knox Charles Saunders George Townshend William Howe James Murray Montcalm † François Gaston de Lévis Antoine de Bougainville Duchambon de Vergor Michel de Langlade Roch de Ramezay Strength 4,400 regulars 1,900 regulars 1,500 colonial militia and natives Casualties and losses 58 killed 600 wounded 116 killed 600 -- 1,200 wounded
Document 10: French and Indian War: Loudoun, a capable administrator but a cautious field commander, planned one major operation for 1757: an attack on New France's capital, Quebec. Leaving a sizable force at Fort William Henry to distract Montcalm, he began organizing for the expedition to Quebec. He was then ordered by William Pitt, the Secretary of State responsible for the colonies, to attack Louisbourg first. Beset by delays of all kinds, the expedition was finally ready to sail from Halifax, Nova Scotia in early August. In the meantime French ships had escaped the British blockade of the French coast, and a fleet outnumbering the British one awaited Loudoun at Louisbourg. Faced with this strength, Loudoun returned to New York amid news that a massacre had occurred at Fort William Henry.
Document 11: Saint Barthélemy: Other trees of note include the royal palm, sea grape trees in the form of shrubs on the beaches and as 5 to 7 m trees in the interior areas of the island, aloe or aloe vera (brought from the Mediterranean), the night blooming cereus, mamillaria nivosa, yellow prickly pear or barbary fig which was planted as barbed wire defences against invading British army in 1773, Mexican cactus, stapelia gigantea, golden trumpet or yellow bell which was originally from South America, bougainvillea and others.
Document 12: New France: In 1758, British forces again captured Louisbourg, allowing them to blockade the entrance to the St. Lawrence River. This proved decisive in the war. In 1759, the British besieged Quebec by sea, and an army under General James Wolfe defeated the French under General Louis-Joseph de Montcalm at the Battle of the Plains of Abraham in September. The garrison in Quebec surrendered on 18 September, and by the next year New France had been conquered by the British after the attack on Montreal, which had refused to acknowledge the fall of Canada. The last French governor-general of New France, Pierre François de Rigaud, Marquis de Vaudreuil-Cavagnal, surrendered to British Major General Jeffery Amherst on 8 September 1760. France formally ceded Canada to the British in the Treaty of Paris, signed 10 February 1763.
Document 13: Northern Seven Years' War: The history of the Seven Years' War in North America, particularly the expulsion of the Acadians, the siege of Quebec, the death of Wolfe, and the Battle of Fort William Henry generated a vast number of ballads, broadsides, images, and novels (see Longfellow's Evangeline, Benjamin West's The Death of General Wolfe, James Fenimore Cooper's The Last of the Mohicans), maps and other printed materials, which testify to how this event held the imagination of the British and North American public long after Wolfe's death in 1759.
Document 14: Trang Province: The seal of the province shows a lighthouse bridge above a sea of waves. The lighthouse bridge refers to Trang as a seaport trading with foreign countries.The provincial symbolic flower and tree is the green ebony (Jacaranda filicifolia). The plant was imported from Australia by the same governor who imported the rubber tree, and it quickly got the name "si trang" by the citizens.
Document 15: Legends of the coco de mer: Nut and tree of the coco de mer, a rare species of palm tree native to the Seychelles archipelago in the Indian Ocean, is the subject of various legends and lore. Coco de mer is endemic to the Seychelles islands of Praslin and Curieuse. Before the Seychelles were discovered and settled, nuts of this species were sometimes carried by the ocean currents to distant shores, such as those of the Maldives, where the tree was unknown. These floating nuts did not germinate. The exceptional size and suggestive form of the nut, the circumstances of its discovery, and some unusual qualities of the trees have given rise to several legends.
ground_truth: 1773
sub_queries: Louisbourg Grenadiers >> military branch Answer: British Army
When did British Army invade the island? Answer: 1773