In February 2016, Amnesty International (AI) reported that it had investigated the circumstances and impact of more than 30 air strikes of the Saudi Arabia-led coalition forces in Sanaʽa, Hodeidah, Hajjah and Sa'da. They believed that the coalition was intentionally striking civilian targets. On 24 April 2015, Amnesty International said that airstrikes hit five densely populated areas (Sa'dah, Sanaʽa, Hodeidah, Hajjah and Ibb), and "raise concerns about compliance with the rules of international humanitarian law." Their research indicates that there were at least 97 civilian deaths, including 33 children, and 157 civilians were wounded.
On 4 September a Houthi OTR-21 Tochka missile hit an ammunition dump at a military base in Safer in Ma'rib Governorate killing 52 UAE, 10 Saudi and 5 Bahraini soldiers. The Safer base was being built up by coalition forces for a push against Sanaa. "It was the deadliest single attack on coalition soldiers since the start of its operation against Houthi rebels in March" Asseri said. The attacked was the highest casualty loss in the history of the UAE military. Qatar deployed 1000 troops to Yemen after the incident.
More InfoOn 13 April 2015, HRW wrote that some airstrikes were in apparent violation of the laws of war, such as 30 March attack on a displaced-persons camp in Mazraq that struck a medical facility and a market. Other incidents noted by HRW that had been deemed as indiscriminate or disproportionate or "in violation of the laws of war" were: a strike on a dairy factory outside the Red Sea port of Hodaida (31 civilian deaths); a strike that destroyed a humanitarian aid warehouse of the international aid organization Oxfam in Saada; and the coalition's blockade that kept out fuel. On 30 June 2015, HRW reported that several airstrikes were in clear violation of international law. The report confirmed 59 (including 14 women and 35 children) civilian deaths in Saada between 6 April and 11 May. The report also highlighted attacks on 6 civilian homes as well as five markets that were deliberate attacks.
More InfoBy 26 April, coalition forces were striking what they described as Houthi military targets in Sanaʽa and Aden and in other locations, notably in Sa'ada province near the Saudi border, nearly every night. On 26 April, after midnight, airstrikes struck Houthi and pro-Saleh positions and targets in and around Sanaʽa, Aden, and the Ma'rib and Ad Dali' governorates, backing up anti-Houthi fighters in the latter three locations, with more than 90 rebels reportedly killed. Coalition warships shelled fighters near Aden's commercial port. Saudi warplanes also targeted Houthis in the Sa'dah Governorate, while Saudi artillery fired on targets in the Hajjah Governorate along the border. The Saudi National Guard was deployed on the border.
More InfoEgypt and Saudi Arabia committed warships to support coalition operations. Somalia offered its airspace and territorial waters. Four Egyptian Navy vessels steamed toward the Gulf of Aden after operations began. Riyadh requested access to Somali airspace and waters to carry out operations. On 27 March, the Egyptian military said a squadron of Egyptian and Saudi warships took up positions at the Bab al-Mandab strait. The Saudi military threatened to destroy any ship attempting to make port.
More InfoFighter jets and ground forces from Egypt, Morocco, Jordan, Sudan, the United Arab Emirates, Kuwait, Qatar, Bahrain, and Academi (formerly called Blackwater) took part in the operation. Djibouti, Eritrea, and Somalia made their airspace, territorial waters, and military bases available to the coalition. The United States provided intelligence and logistical support, including aerial refueling and search-and-rescue for downed coalition pilots. It also accelerated the sale of weapons to coalition states and continued strikes against AQAP. The US and Britain have deployed their military personnel in the command and control centre responsible for Saudi-led air strikes on Yemen, having access to lists of targets.
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