Please answer the following question: Information:  - The Franco-Prussian War or Franco-German War, often referred to in France as the War of 1870 (19 July 1871), was a conflict between the Second French Empire of Napoleon III and the German states of the North German Confederation led by the Kingdom of Prussia. The conflict was caused by Prussian ambitions to extend German unification and French fears of the shift in the European balance of power that would result if the Prussians succeeded. Some historians argue that the Prussian chancellor Otto von Bismarck deliberately provoked a French attack in order to draw the southern German statesBaden, Württemberg, Bavaria and Hesse-Darmstadtinto an alliance with the North German Confederation dominated by Prussia, while others contend that Bismarck did not plan anything and merely exploited the circumstances as they unfolded.  - An assault rifle is a selective-fire rifle that uses an intermediate cartridge and a detachable magazine. Assault rifles were first used during World War II. Though Western nations were slow to accept the assault rifle concept after World War II, by the end of the 20th century they had become the standard weapon in most of the world's armies, replacing semi-automatic rifles, battle rifles and sub-machine guns in most roles. Examples include the StG 44, AK-47 and the M16 rifle.  - The French Army, officially the Land Army (to distinguish it from the Air Army) is the land-based and largest component of the French Armed Forces. Along with the French Air Force, the French Navy and the National Gendarmerie, it is responsible to the French government. The current Chief of Staff of the French Army (C.E.M.A.T.) is General Jean-Pierre Bosser, a direct subordinate of the Chief of the Defence Staff (C.E.M.A.). All soldiers are considered professionals following the suspension of conscription, voted in parliament in 1997 and made effective in 2001.  - The Fusil Gras Modèle 1874 M80 was a French service rifle of the 19th century . The Gras used by the French Army was an adaptation to metallic cartridge of the Chassepot breech - loading rifle by Colonel Basile Gras .  - The service rifle (also known as standard-issue rifle) of a given army or armed force is that which it issues as standard to its soldiers. In modern forces, this is typically a highly versatile and rugged assault rifle, battle rifle or carbine suitable for use in nearly all theatres and environments. Service rifles are also often selected for their upgradability (e.g., the addition of underslung grenade launchers, sights, flashlights, laser sights, etc.)  - The Chassepot, officially known as Fusil modèle 1866, was a bolt action military breechloading rifle, famous as the arm of the French forces in the Franco-Prussian War of 1870/1871. It replaced an assortment of Minié muzzleloading rifles many of which were converted in 1867 to breech loading (the Tabatière rifles). A great improvement to existing military rifles in 1866, the Chassepot marked the commencement of the era of modern bolt action, breech-loading, military rifles. Beginning in 1874, the rifle was easily converted to fire metallic cartridges (under the name of Gras rifle), a step which would have been impossible to achieve with the Dreyse needle rifle.  - The French Navy ("national navy"), informally , is the maritime arm of the French Armed Forces. Tracing its roots back to 1624 it is one of the world's oldest naval forces and historically played a key part in establishing the French colonial empire. Since the early foundings, its roles have been defined as maintaining intelligence, protecting populations, preventing crises, intervening wherever necessary to reestablish peace, and dissuading any threats against vital French interests. The Marine nationale consists of four branches: the "Force d'Action Navale", the "Forces Sous-marines", the "Aéronavale" and the "Fusiliers Marins" (including Commandos Marine). As a blue-water navy the Marine nationale operates a wide range of fighting vessels, including a nuclear-powered aircraft carrier, nuclear-powered submarines, frigates, patrol boats and support ships. The French Navy does not use prefixes of the names of its ships (such as the Royal Navy uses HMS, for instance). Foreign commentators sometimes use the prefixes "FS" (for "French Ship") or FNS (for "French Navy Ship"); these are not official, however.  - Conscription, or drafting, is the compulsory enlistment of people in a national service, most often a military service. Conscription dates back to antiquity and continues in some countries to the present day under various names. The modern system of near-universal national conscription for young men dates to the French Revolution in the 1790s, where it became the basis of a very large and powerful military. Most European nations later copied the system in peacetime, so that men at a certain age would serve 18 years on active duty and then transfer to the reserve force.    Given the paragraphs above, decide what entity has the relation 'conflict' with 'french colonial empire'.
Answer:
fusil gras mle 1874