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Yemen vs. Saudi Arabia

Military

YemenSaudi Arabia
Military branches

as of 2020-2021, military and security forces operating in Yemen consists of a patchwork of government, non-state, and foreign-backed regular, semi-regular/militia, and paramilitary forces, often with informal command organizations and conflicting, fluid, or overlapping agendas, loyalties, and relationships; in addition, the Huthis maintain opposition military and security forces

Republic of Yemen Government (ROYG) forces; Ministry of Defense: Yemeni National Army, Air Force and Air Defense, Navy and Coastal Defense Forces, Border Guard, Strategic Reserve Forces (includes Special Forces and Presidential Protection Brigades, which are under the Ministry of Defense but responsible to the president), Popular Committee Forces (government-backed tribal militia); Ministry of Interior: Special Security Forces (paramilitary; formerly known as Central Security Forces), Political Security Organization (state security), National Security Bureau (intelligence), Counterterrorism Unit

Saudi-backed forces: paramilitary/militia border security brigades based largely on tribal or regional affiliation (deployed along the Saudi-Yemen border, especially the areas bordering the governorates of Saada and Al-Jawf)

United Arab Emirates-backed forces include tribal and regionally-based militia and paramilitary forces (concentrated in the southern governates):  Southern Transitional Council (STC) forces, including the Security Belt Forces, the Shabwani and Hadrami "Elit-e" Forces, the Support and Backup Forces (aka Logistics and Support Forces), Facilities Protection Forces, and Anti-Terrorism Forces; Republican Forces; Joint Forces; note - under the 2019 Riyadh Agreement, the STC forces are to be incorporated into Yemen's Ministries of Defense and Interior under the authority of the HADI government

Huthi: ground, air/air defense, coastal defense, presidential protection, special operations, missile, and tribal militia forces



note - a considerable portion--up to 70 percent by some estimates--of Yemen's military and security forces defected in whole or in part to former president SALAH and the Huthi opposition in 2011-2015

Ministry of Defense: Royal Saudi Land Forces, Royal Saudi Naval Forces (includes marines, special forces, naval aviation), Royal Saudi Air Force, Royal Saudi Air Defense Forces, Royal Saudi Strategic Missiles Force; Ministry of the National Guard (SANG); Ministry of Interior: Border Guard, Facilities Security Force (2021)

note: SANG (also known as the White Army) is a land force separate from the Ministry of Defense that is responsible for internal security, protecting the royal family, and external defense
Military service age and obligation18 is the legal minimum age for voluntary military service; conscription abolished in 2001; 2-year service obligation (note - limited information since the start of the civil war) (2019)17 is the legal minimum age for voluntary military service; no conscription; in 2018, women were allowed to serve as soldiers in the internal security services under certain requirements; in 2019, the Saudi Government agreed to allow women to join the armed forces and serve as soldiers up to the rank of non-commissioned officer (2021)
Military expenditures - percent of GDP4.3% of GDP (2014)

4.3% of GDP (2013)

4.7% of GDP (2012)

5% of GDP (2011)

4.8% of GDP (2010)

note - no reliable information exists following the start of renewed conflict in 2015
7% of GDP (2020 est.)

8% of GDP (2019)

9.5% of GDP (2018)

11.1% of GDP (2017)

10.8% of GDP (2016)
Military and security service personnel strengths

information limited and widely varied; ROYG: up to 300,000 estimated military, paramilitary, and militia forces; UAE- and Saudi-backed forces: 150-200,000 estimated trained fighters; Huthis: up to 200,000 estimated fighters (2021)

the Saudi military forces have about 225,000 active troops; approximately 125,000 under the Ministry of Defense (75,000 Land Forces; 14,000 Naval Forces; 36,000 Air Force/Air Defense/Strategic Missile Forces) and approximately 100,000 in the Saudi Arabia National Guard (SANG) (2021)

note: SANG also has an irregular force (Fowj), primarily Bedouin tribal volunteers, with a total strength of approximately 25,000 men
Military equipment inventories and acquisitionsthe inventory of the Yemeni Government forces consists primarily of Russian and Soviet-era equipment, although much of it has been lost in the current conflict; since the start of the civil war in 2014, it has received limited amounts of donated equipment from some Gulf States, including Saudi Arabia and UAE (2020)the inventory of the Saudi military forces, including the SANG, includes a mix of mostly modern weapons systems from the US and Europe; since 2010, the US is the leading supplier of armaments, followed by France and the UK; Saudi Arabia is the world's largest arms importer (2020)

Source: CIA Factbook