Ethiopia will make its debut in the World at War. They are one of the African civs that are started in the Classical era (as Kingdom of Aksum). Later on, they will found the Ethiopian Empire, which that means there might be massive number of unique flavor units that had from the Medieval era until mostly after WW2. The ruling dynasty, the House of Solomon, ruled Ethiopia from 1270 until it's overthrow by the communist Derg in 1974. Note that Ethiopia is the only country in Africa that hasn't been colonized by a foreign power just like Thailand.

Ethiopian civs:

Firaxis' Ethiopia (Haile Selassie)
[BNW] Agla's and TranquilSilence's Derg Ethiopia

In World at War, here are the Ethiopian unique flavor units during the late Imperial period of Ethiopian history. They are ranged from Industrial to WW2 eras. Note that Ethiopia cannot build tanks and aircraft until WW2 era.

Rifleman: Abyssinian Rifle Infantry
Imperial Rifleman: Mehal Sefari
Cavalry: Abyssinian Cavalry

GW Infantry: Ethiopian Interwar Infantry

Infantry: Ethiopian Infantry
Marine: Ethiopian Commandos
Paratrooper: Ethiopian Airborne Troops

Light Tank: M24 Chafee
Tank: M4 Sherman
Hvy Tank: M48 Patton

Artillery: M101 Howitzer
SP Howitzer: M2 Priest

SPAAG: Half-track AA

Fighter MK I: Curtiss P-38
Fighter MK II: Fairey Firefly
Adv Fighter: F-86 Sabre

With the overthrow of the monarchy by the Derg, Ethiopia will have unique flavor units during the Communist period and the present day.

Mobile Inf: BTR-152, in Ethiopian colors
Mech Inf: BMP-2, in Ethiopian colors

MBT: T-55, in Ethiopian colors
Mod Armor: T-72, in Ethiopian colors
Adv Mod Armor: T-90, in Ethiopian colors

SP Artillery: 2S1 Gvozdika, in Ethiopian colors
Rocket Artillery: BM-21 Grad, in Ethiopian colors

Jet Fighter: MiG-29, in Ethiopian colors
5th Generation Fighter: Sukhoi Su-35, in Ethiopian colors

Rocket Artillery: BM-21 Grad, in Ethiopian colors
Helicopter Gunship: Mil Mi-8, in Ethiopian colors
CAS Helicopter: Mil Mi-28, in Ethiopian colors

Missile Destroyer: Udaloy class destroyer
Missile Cruiser: Kirov class battlecruiser
Attack Submarine: Kilo class submarine

Next is South Africa, which is represented by the Zulus. Being a dominion of the British Empire, it starts in WW1 era. Later, it will become a Republic as a result of it breaking ties with the Monarchy in London, but returned to the fold after its democratization in 1994. Nowadays, South Africa remains a republic within the Commonwealth.

Unfortunately, @TPangolin 's mod, the South Africa led by Nelson Mandela, is no longer available in the workshop as of last year. It seems Colonialist Legacies no longer mods Civ V anymore.

South African unique units. This corresponds to the equipment being used by the Union Defence Force, and nowadays the South African National Defence Force.

GW Infantry: South African Overseas Expeditionary Force
Infantry: South African Infantry (WW2)
Marine: 9 South African Infantry Battalion
Paratrooper: 44 Parachute Regiment
Special Forces: South African Special Forces Brigade
Mobile Inf: FV603 Saracen
Mech Inf: Badger IFV

Light Tank: Valentine Tank
Tank: Cromwell Tank
Hvy Tank: Sherman Firefly
Main Battle Tank: Centurion Tank
Modern Armor: Olifant MK 2 MBT
Adv Mod Armor: Challenger 3 MBT

Fighter MK I: Supermarine Spitfire
Fighter MK II: P-51 Mustang
Adv Fighter: F-86 Sabre
Jet Fighter: Atlas Cheetah
5th Generation Fighter: JAS 39 Gripen

Light Bomber: Bristol Blenheim
Bomber: Bristol Beaufort
Heavy Bomber: Vickers Warwick Mk.V
CAS Fighter: JAS 39 Gripen

Hvy Howitzer: QF-25 Pounder
Artillery: M101 howitzer
AA: Crusader AA
Anti-Tank Gun: Archer SPATG
SP Artillery: G6 howitzer
Rocket Artillery: Bateleur FV2

Attack/CAS Helicopter: Denel Rooivalk

Missile Destroyer: Valour Class Frigate
Missile Cruiser: Type 45 destroyer
Attack Submarine: Heroine-class Submarine

Congo will make its debut in the WAW. It should be noted that this civ is exclusive in the BNW scenario "Scramble for Africa".

Congo starts in the Industrial era.

Congolese units.

Rifleman: Force Publique
Imperial Rifleman: Governor-General's Bodyguard
Cavalry: Force Publique Cavalry

GW Infantry: Force Publique (WW1)

Infantry: Congolese Infantry
Marine: Congolese Marines
Paratrooper: Congolese Paratroopers
Special Forces: Congolese Special Forces
Mobile Inf: BTR-80 APC
Mech Inf: BMP-2 IFV

Light Tank: Vickers T-15 Tank
Tank: Renault AMC-35 Tank
Hvy Tank: Sherman Firefly
Main Battle Tank: T-55 Tank
Modern Armor: T-72 MBT
Adv Mod Armor: T-90 Tank

Fighter MK I: Hawker Hurricane
Fighter MK II: Supermarine Spitfire
Adv Fighter: MiG-15
Jet Fighter: MiG-29
5th Generation Fighter: Sukhoi Su-35

Light Bomber: Bristol Blenheim
Bomber: Bristol Beaufort
Heavy Bomber: Lancaster Bomber
CAS Fighter: Sukhoi Su-25

Hvy Howitzer: QF-25 Pounder
Artillery: M101 howitzer
SP Artillery: 2S1 Gvozdika
Rocket Artillery: BM-21 Grad

AA: M16 MGMC
Mobile SAM: 2K12 Kub

Helicopter Gunship: Mil Mi-8
Attack Helicopter: Mil Mi-24
CAS Helicopter: Mil Mi-28

Missile Destroyer: Udaloy-class Destroyer
Missile Cruiser: Slava-class Cruiser
Attack Submarine: Kilo-class Submarine

There's a Congolese civ for this mod.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1857018070

Next is Tanzania. Being a former colony of the United Kingdom, it starts in the Cold War era.

Tanzanian units.

Infantry: TPDF Infantry
Marine: TPDF Marines
Paratrooper: TPDF Paratroopers
Special Forces: TPDF Special Forces
Mobile Inf: Type 63 APC
Mech Inf: Type 86 IFV

Main Battle Tank: Type 59 Tank
Modern Armor: VT-2 MBT
Adv Mod Armor: VT-4 MBT

Adv Fighter: Shenyang J-6
Jet Fighter: Chengdu J-10
5th Generation Fighter: Shenyang J-16

CAS Fighter: Xi'an JH-7

Artillery: Type 66 Towed Howitzer
SP Artillery: PLZ-89
Rocket Artillery: PHL-81 MLRS

AA: ZSU-37 SPAAG
Mobile SAM: PGZ-09 SPAAG

Helicopter Gunship: Harbin Z-9
Attack Helicopter: Harbin Z-19
CAS Helicopter: Changhe Z-10

Missile Destroyer: Luyang III-class destroyer
Missile Cruiser: Renhai-class cruiser
Attack Submarine: Song-class Submarine

Here's the Tanzanian civ for this mod.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=603464184

Next is Mozambique. Being a former Portuguese colony, it starts in the Cold War era.

Mozambican units.

Infantry: FPLM Infantry
Marine: FPLM Marines
Paratrooper: FPLM Paratroopers
Special Forces: FPLM Special Forces
Mobile Inf: BTR-152 APC
Mech Inf: BMP-2 IFV

Main Battle Tank: T-55 Tank
Modern Armor: T-72 MBT
Adv Mod Armor: T-90 MBT

Adv Fighter: MiG-15
Jet Fighter: MiG-29
5th Generation Fighter: Su-35

CAS Fighter: Su-25

Artillery: M-46 Artillery
SP Artillery: 2S1 Gvozdika
Rocket Artillery: BM-21 Grad

AA: ZSU-37 SPAAG
Mobile SAM: 2K12 Kub

Helicopter Gunship: Mil Mi-8
Attack Helicopter: Mil Mi-24
CAS Helicopter: Mil Mi-28

Missile Destroyer: Udaloy-class Destroyer
Missile Cruiser: Slava-class Cruiser
Attack Submarine: Kilo-class Submarine

Mozambican civ.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1852247176

Angola is next to be debuted in WAW. Being a former Portuguese colony and one of the Communist countries in Africa, it starts in the Cold War era.

Here are the units and the Angolan civ.

Infantry: FAPLA Infantry
Marine: FAPLA Marines
Paratrooper: FAPLA Paratroopers
Special Forces: FAPLA Special Forces Brigade
Mobile Inf: BTR-80 APC
Mech Inf: BMP-2 IFV

Light Tank: Valentine Tank
Tank: Cromwell Tank
Hvy Tank: Sherman Firefly
Main Battle Tank: T-55 Tank
Modern Armor: T-72 MBT
Adv Mod Armor: T-90 Tank

Fighter MK I: Hawker Hurricane
Fighter MK II: Supermarine Spitfire
Adv Fighter: MiG-15
Jet Fighter: MiG-29
5th Generation Fighter: Sukhoi Su-35

Light Bomber: Bristol Blenheim
Bomber: Bristol Beaufort
Heavy Bomber: Lancaster Bomber
CAS Fighter: Sukhoi Su-25

Hvy Howitzer: QF-25 Pounder
Artillery: M101 howitzer
SP Artillery: 2S1 Gvozdika
Rocket Artillery: BM-21 Grad

AA: M16 MGMC
Mobile SAM: 2K12 Kub

Helicopter Gunship: Mil Mi-8
Attack Helicopter: Mil Mi-24
CAS Helicopter: Mil Mi-28

Missile Destroyer: Udaloy-class Destroyer
Missile Cruiser: Slava-class Cruiser
Attack Submarine: Kilo-class Submarine

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1852245998

Nigeria will make its debut in WAW. As one of the former colonies of the United Kingdom and a member of the Commonwealth of Nations, it starts in the Cold War era.

Infantry: Nigeria Regiment
Marine: 403rd Amphibious Brigade, Nigerian Army
Paratrooper: 72nd Special Forces Battalion, Nigerian Army
Special Forces: 72nd Special Forces Battalion, Nigerian Army
Mobile Inf: BTR-80 APC
Mech Inf: BMP-2 IFV

Light Tank: Valentine Tank
Tank: Cromwell Tank
Hvy Tank: Sherman Firefly
Main Battle Tank: T-55 Tank
Modern Armor: T-72 MBT
Adv Mod Armor: T-90 Tank

Fighter MK I: Hawker Hurricane
Fighter MK II: Supermarine Spitfire
Adv Fighter: MiG-15
Jet Fighter: MiG-29
5th Generation Fighter: Sukhoi Su-35

Light Bomber: Bristol Blenheim
Bomber: Bristol Beaufort
Heavy Bomber: Lancaster Bomber
CAS Fighter: Sukhoi Su-25

Hvy Howitzer: QF-25 Pounder
Artillery: M101 howitzer
SP Artillery: 2S1 Gvozdika
Rocket Artillery: BM-21 Grad

AA: Crusader AA
Anti-Tank Gun: Archer SPATG
Mobile SAM: 2K12 Kub

Helicopter Gunship: Mil Mi-8
Attack Helicopter: Mil Mi-24
CAS Helicopter: Mil Mi-28

Missile Destroyer: Udaloy-class Destroyer
Missile Cruiser: Slava-class Cruiser
Attack Submarine: Kilo-class Submarine

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3048510542

Uganda will be included in WAW. It is one of Britain's former colonies and, as of now, a member of the Commonwealth of Nations.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2642776152

Rwanda will be included in WAW. It is one of the Bantu countries existed since the 15th century.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=603451504

Burundi will be included in WAW.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=603454712

Mali will be included in WAW. It is the cradle of the West African civ, particularly the Songhai; and one of the civs belonging to Francophone Africa. It starts in the Cold War.

WW2 Era

Infantry: Malian Infantry
Marine: Malian Marine
Paratrooper: Malian Paratrooper
Bazooka: Malian RPG Trooper

Light Tank: T-26 (Mali)
Tank: T-34/85 (Mali)
Hvy Tank: IS-2 (Mali)

Hvy Howitzer: ZiS-3 (Mali)
Artillery: ML-20 (Mali)
Rocket Launcher: BM-13 Katyusha (Mali)

SPAAG: ZSU-37 (Mali)
Tank Destroyer: SU-100 (Mali)

Fighter MK I: Yakolev Yak-3 (Mali)
Fighter MK II: Lavochkin La-9 (Mali)
Adv Fighter: MiG-15 (Mali)

Light Bomber: Ilyushin DB-3 (Mali)
Bomber: Ilyushin Il-4 (Mali)
Hvy Bomber: Tupolev Tu-2 (Mali)

Cold War Era.

Mobile Inf: BTR-70 (Mali)
Mech Inf: BMP-2 (Mali)
Special Forces: Malian Special Forces

MBT: T-55 (Mali)
Mod Armor: T-72 (Mali)
Adv Mod Armor: T-90 (Mali)

Tracked SAM: ZSU-23-4 Shilka (Mali)
Mobile SAM: 2K12 Kub (Mali)

SP Artillery: 2S1 Gvozdika (Mali)
Rocket Artillery: BM-21 Grad (Mali)

Jet Fighter: MiG-29 (Mali)
5th Gen Fighter: Sukhoi Su-35 (Mali)

CAS Fighter: Sukhoi Su-25 (Mali)

Helicopter Gunship: Mil Mi-8
Attack Helicopter: Mil Mi-24
CAS Helicopter: Mil Mi-28

Senegal will be included in WAW. It is the one of the civs belonging to Francophone Africa.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1854261582

Burkina Faso is included in WAW. An African socialist state, it is one of the civs belonging to Francophone Africa.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1847508275

Kenya is included in WAW. Being a former British colony, it starts in the Cold War era. It is one of the Commonwealth of Nations member states.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1574896851

Zambia is included in WAW. A former British colony as Northern Rhodesia and as of now one of the African socialist states, it starts in the Cold War.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1706948784