The reference to a "new order" is twofold. First and foremost, it is a phenomenon linked to the political events that followed the Napoleonic period, in particular the Congress of Vienna (1815), whose primary objective was to re-establish the pre-1789 balance of power, with the avowed aim of erasing and preventing nationalist, secessionist or unifying movements and any popular uprisings deemed destabilizing to the system thus established. The Ottoman Empire, which managed to steer clear of the main Napoleonic conflicts, did not take part in the congress, but was one of its objects, notably through the issue of defending its territorial integrity against independence and secessionist movements in the Balkans.
However, the Greek rebellion of 1821, which soon took on the proportions of a war of independence, revealed the ephemeral nature of these resolutions. After years of more or less benevolent neutrality, culminating in the Battle of Navarino (1827), the European powers finally intervened on behalf of the insurgents, thus constituting the first departure from the system with the creation of an independent Greece.
The notion of a "new order" is also a reminder of the term used by Selim III to describe his program of fiscal and military reform, the Nizam-ı Cedid. Mahmud Raif Efendi's New Regulations of the Ottoman Empire (1798) was an excellent example. However, this "new order" was also the cause of a reaction led in particular by the janissaries who, feeling threatened by the project of a new army, rose up and obtained the dismissal of Selim III in 1807 and assassinated him the following year, during the counter-revolution that put the young Mahmud II on the throne.