Baghdad fell to the Mongols in 1258.
1258
Hülegü Khan of the Mongols conquered Baghdad in 1258, effectively ending the Abbassid Caliphate.
There are quite a number of Arab Empires. Assuming you are referring to the Abbassid Caliphate, that was destroyed in 1258, when the Mongols led by Hulegu Khan razed Baghdad to the ground.
The answer you are looking for is: Baghdad. However, it is not actually correct for the question as phrased. The Abbassids were not the last Islamic Empire, Qajjar Persia was. It just happens that the Abbassids were the last Arab-Islamic Empire. Additionally, Baghdad was sacked by the Mongols, who were not Muslims at that time.
The Mongols fell from power and influence in the 14th century due to factors such as internal divisions, overextension of their empire, and the impact of the Black Death. These challenges weakened their control and led to the decline of their empire.
1258
Many of the Mongols converted to Islam. They intermarried with the local people. Over time, the Mongols rebuilt the cities they destroyed during the invasion. In order to capture Baghdad, the Mongols laid a brutal siege upon the city in 1258. Additionally, the Mongols as a political force were expelled from Baghdad in 1341. The Mongols as an ethnic group were never a large population, this meant that after the fall of the Mongol political unit that they were quickly overcome by intermarriage and disappeared ethnically after the mid-1400s.
Mongols
Mongols Besiege
The Mongols
Inevitable means that there is no possible way that it could have been avoided. As evidenced by the Mamluk victory over the Mongols at the Battle of Ain Jalut, it was possible to defeat the Mongols, so there may have been a way to prevent the Mongol razing of Baghdad in 1258. However, given that: (1) the Abbassid Caliphate (which controlled Baghdad) had been in a state of decay for nearly 200 years, (2) the ascendancy of the Mongol Empire and its near invulnerability, (3) the animosity between the empires of the Islamic World whose union would be necessary to hold off the Mongols, and (4) and the inability of Baghdad to withstand a long-term siege, it would seem that the fall of Baghdad at that time was a highly likely event.
The Chinese were the cause of the fall of the mongols
The Mongols invaded the muslims and burnt their capital "Baghdad". Persia was the week point were they managed to get through and beat the Abbasid Dynasty.
Hülegü Khan of the Mongols conquered Baghdad in 1258, effectively ending the Abbassid Caliphate.
fall of the mongols and the fall of the byzantine empire which led to decrease in trade
The fall of Baghdad was Hulegu's greatest military accomplishment.
There are quite a number of Arab Empires. Assuming you are referring to the Abbassid Caliphate, that was destroyed in 1258, when the Mongols led by Hulegu Khan razed Baghdad to the ground.