On April 2, 2015 (February 14, 2015 in the lunar calendar), 147 people were killed in an attack on Garissa University in Kenya. At around 5:30 am on April 2, 2015, four masked attackers broke into the Moi University campus with bombs and launched an attack on non-Muslim students. The Kenyan army then surrounded the campus and surrounded the attackers in the dormitory area of the school. The rescue operation that lasted for 16 hours that day has ended. All four gangsters were killed. A total of 147 people were killed and 179 injured in the attack. Some of the injured have been sent to hospitals in the capital Nairobi for treatment. Kenyan government forces rescued more than 500 people in the rescue operation. Somali "Al-Shabaab" admitted to carrying out the attack in retaliation for the government's attack on it. The attack on Moi University in Garissa is the worst terror attack in Kenya since the Shabab sent troops into Somalia in 2011 to encircle militants. In September 2013, the "Shabab" carried out a terrorist attack on Nairobi's Westgate shopping mall, killing 67 people. The Somali Shabab carried out the attack and took stock of the rescue scene. The Kenyan army then sent tanks to surround the campus. A woman was injured in the attack. The Somali "Shabab" linked to "Al Qaeda" admitted to responsible for the attack. The Somali Shabab is a vicious extremist organization. The Somali Shabab is the main anti-government armed group in Somalia. It is linked to "Al Qaeda" and uses vicious means to undermine Somalia's peace and civil society. The group controls most of the country in south-central Somalia and has been trying to overthrow the Somali government backed by the African Union and Western countries. In 2008, the United States designated al-Shabab as a "terrorist organization", and the previous leader was also killed in US airstrikes. In 2009 and 2012, al-Shabab twice declared allegiance to "Al Qaeda". Somalia's Shabab continues to create terrorist bombings: On September 21, 2013, at least 59 people were killed and more than 200 injured in an attack on a shopping mall in Kenya. The Somali rebel Shabab announced that it was responsible for the bloodshed. The Chinese Embassy in Kenya confirmed that a Chinese woman was killed in the attack. On June 15, 2014, the June 15 attack in the Kenyan town of Mpeketoni was suspected to be the real culprit behind the Somali Shabab. On September 1, 2014, the US military launched an airstrike on the Somali Shabab camp late at night, with the goal of "eradicating" the leader of the group, Ahmed Abdi Gudan. At around 1 am on December 2, 2014, the Somali Shabab attacked a quarry in the northern Mandela region, killing at least 36 people. In 2011, Kenya sent troops to neighboring Somalia, citing frequent cross-border attacks on tourist resorts in the north. Under the attack of other African Union countries, al-Shabaab retreated and withdrew from the capital Mogadishu. The number of al-Shabaab fighters reached 7,000-9,000, and in 2011 alone, it received nearly $100 million in revenue through illegal taxation.