Question: When did Muslim armies invade the country where Al-Mu'tamid's successor was a citizen and the country where Rankus is located?

<P0-S0> by 1940 the third reich had occupied many of the alpine countries. <P0-S1> austria underwent a political coup that made it part of the third reich; france had been invaded and italy was a fascist regime. <P0-S2> switzerland was the only country to luckily avoid invasion. <P0-S3> the swiss confederate mobilized its troops—the country follows the doctrine of "armed neutrality" with all males required to have military training—a number that general eisenhower estimated to be about 850,000. the swiss commanders wired the infrastructure leading into the country, and threatening to destroy bridges, railway tunnels and passes in the event of a nazi invasion, and then they retreated to the heart of the mountain peaks where conditions were harsher and a military invasion would involve difficult and protracted battles. <SEP> <P1-S0> The Muslim conquest of the Levant (Arabic: اَلْـفَـتْـحُ الْإٍسْـلَامِيُّ لِـلـشَّـامِ ‎, Al - Faṫṫḥul - Islāmiyyuash - Shām) or Arab conquest of the Levant (Arabic: اَلْـفَـتْـحُ الْـعَـرَبِيُّ لِـلـشَّـامِ ‎, Al - Faṫṫḥul - ʿArabiyyu Lish - Shām) occurred in the first half of the 7th century, and refers to the conquest of the region known as the Levant or Shaam (Arabic: شَـام ‎, 'Syria'), later to become the Islamic Province of Bilad al - Sham, as part of the Islamic conquests. <P1-S1> Arab Muslim forces had appeared on the southern borders even before the death of prophet Muhammad in 632, resulting in the Battle of Mu'tah in 629, but the real invasion began in 634 under his successors, the Rashidun Caliphs Abu Bakr and Umar ibn Khattab, with Khalid ibn al - Walid as their most important military leader. <SEP> <P2-S0> Under al-Mu'tadid he served as commander of the caliph's personal guard and led various expeditions against Bedouins and other restive elements in Iraq, while al-Muqtafi dispatched him in 906 against the Qarmatians. <P2-S1> After al-Muqtafi's death, he played a decisive role in the suppression of the palace coup that briefly deposed al-Muqtadir in favour of Abdallah ibn al-Mu'tazz. <P2-S2> He was then named treasurer ("khazin") and chief of security ("sahib al-shurta") to the Caliph. <P2-S3> He died in 914. <SEP> <P3-S0> between 1528 and 1540, armies of muslims, under the imam ahmad ibn ibrihim al - ghazi, entered ethiopia from the low country to the south - east, and overran the abyssinian kingdom, obliging the emperor to take refuge in the mountain fastnesses. <P3-S1> in this remote location, the ruler again turned to the portuguese. <P3-S2> joão bermudes, a subordinate member of the mission of 1520, who had remained in the country after the departure of the embassy, was, according to his own statement (which is untrustworthy), ordained successor to the abuna (archbishop), and sent to lisbon. <P3-S3> bermudes certainly came to europe, but with what credentials is not known. <SEP> <P4-S0> Rankous or Rankus () is a Syrian town and summer resort in the province's Damascus countryside (Rif Dimashq) located in Mount Qalamoun (anti-Lebanon) in Syria, 45 km from Damascus, with a total area of 22.277 km ², extends between 1650 and 2150 m. The climate of the town is cool in summer and cold in winter. <P4-S1> The rate of rain and snow usually varies between 350 and 650 mm. <P4-S2> The mountains surrounding the town are covered with snow in winter. <P4-S3> According to the Syria Central Bureau of Statistics (CBS), Rankous had a population of 7,717 in the 2004 census. <SEP> <P5-S0> Al-Mu'tadid was the son of al-Muwaffaq, who was the regent and effective ruler of the Abbasid state during the reign of his brother, Caliph al-Mu'tamid. <P5-S1> As a prince, the future al-Mu'tadid served under his father during various military campaigns, most notably in the suppression of the Zanj Rebellion, in which he played a major role. <P5-S2> When al-Muwaffaq died in June 891 al-Mu'tadid succeeded him as regent. <P5-S3> He quickly sidelined his cousin and heir-apparent al-Mufawwad, and when al-Mu'tamid died in October 892, he succeeded to the throne. <P5-S4> Like his father, al-Mu'tadid's power depended on his close relations with the army. <P5-S5> These were first forged during the campaigns against the Zanj and were reinforced in later expeditions which the Caliph led in person: al-Mu'tadid would prove to be the most militarily active of all Abbasid caliphs. <P5-S6> Through his energy and ability, he succeeded in restoring to the Abbasid state some of the power and provinces it had lost during the turmoil of the previous decades.