On 3 February , 20,000 people protested against the government in Sanaʽa , while others protested in Aden , a southern Yemeni seaport city , in a `` Day of Rage '' called for by Tawakel Karman , while soldiers , armed members of the General People 's Congress and many protesters held Defending a pro-government rally in Sanaʽa .

In a `` Friday of Anger '' on 18 February , tens of thousands of Yemenis took part in anti-government demonstrations in Taiz , Sanaʽa and Aden .

These events followed the important Ottoman defeat Conquering in the Second Siege of Diu in 1546 , which put Placing a stop to their attempts in India , but also the successful Capture of Aden ( 1548 ) , which allowed Preventing_or_letting the Ottomans to resist Defending the Portuguese in the northwestern part of the Indian Ocean .

Ultimately , they managed to occupy Control and control Control the coasts of Yemen , Aden and Arabia , as far north as Basra , so as to facilitate Cause_to_make_progress their trade with India and block Hindering the Portuguese from attacking the Hijaz .