Although nominally part of the Ottoman Empire, Yemen and the sahil  came progressively under the control of Muhammad Ali, ruler of Egypt, between 1821 and 1841. After the Egyptians withdrew from the Yemeni seaboard in 1841, Haj Ali Shermerki, a successful and ambitious Somali merchant, purchased from them executive rights over Zeila. Shermerki's governorship had an instant effect on the city, as he manoeuvred to monopolize as much of the regional trade as possible, with his sights set as far as Harar and the Ogaden. Shermerki was later succeeded as Governor of Zeila by Abu Bakr Pasha, a local Afar statesman. In 1874-75, the Egyptians obtained a firman from the Ottomans by which they secured claims over the city. At the same time, the Egyptians received British recognition of their nominal jurisdiction as far east as Cape Guardafui. In actuality, however, Egypt had little authority over the interior and their period of rule on the coast was brief, lasting only a few years . The British Somaliland protectorate was subsequently established in the late 1880s, after the ruling Somali authorities signed a series of protection treaties granting the British access to their territories on the northwestern coast. Among the Somali signatories were the Gadabuursi , Habar Awal , and Warsangali. When the Egyptian garrison in Harar was eventually evacuated in 1885, Zeila became caught up in the competition between the Tadjoura-based French and the British for control of the strategic Gulf of Aden littoral. By the end of 1885, the two powers were on the brink of armed confrontation, but opted instead to turn negotiations. They later signed a convention on 1 February 1888 defining the border between French Somaliland and British Somaliland.

Question: For how many years did Yemen and the sahil come under control of Muhammad Ali, ruler of Egypt?
Answer: 20

Question: Which happened first, the evacuation of the Egyptian garrison in Harar or the signing of the convention defining the border between French Somaliland and British Somaliland?
Answer: evacuated in 1885

Question: How many years did Yemen progressively come under the control of Muhammad Ali?
Answer: 20

Question: Who was Governor of Zeila first, Abu Bakr Pasha or Haj Ali Shermerki?
Answer: Haj Ali Shermerki

Question: Which event happened first, Yemen and the sahil became under the control or the Egyptian garrison being evacuated?
Answer: Yemen and the sahil

Question: Which event happened first, the garrison being evacuated or the convention being signed?
Answer: garrison

Question: Muhammad Ali slowly took control of what?
Answer: Yemen

Question: How many empires was Muhammad Ali in control of?
Answer: 2

Question: who was Haj Ali Shermerki
Answer: successful and ambitious Somali merchant

Question: How many years passed from when Muhammad Al ruled Egypt to when Harar was evacuated?
Answer: 64

Question: How many years were Yemen and the sahil under the control of Muhammad Ali, ruler of Egypt?
Answer: 20

Question: How many years after the Egyptians withdrew from the Yemeni seaboard did the Egyptians obtain a firman from the Ottomans which secured their claims over the city?
Answer: 33

Question: How many years after Zeila became caught up in the competition between the Tadjoura-based French and the British for control of the strategic Gulf of Aden littoral and the two powers were on the brink of armed confrontation did they sign a convention defining the border between French Somaliland and British Somaliland.
Answer: 3

Question: How many years did Muhammad Ali rule Yemen and the sahil?
Answer: 20

Question: How many years did Egyptians obtain a firman from the Ottomans?
Answer: 1

Question: How many minimum Somali signatories signed the treaties in the late 1880s?
Answer: 3

Question: Who signed a convention on 1 February 1888?
Answer: Tadjoura-based French and the British

Question: How many years did it take Yemen and the sahil to come under control of Muhammad Ali?
Answer: 20