Explanation for SADR as I understand it: some tribes lived there with no official state until the Spanish colonialism, colonialism did what colonialism does then after the independence movements in the world from colonialism the polizario front was formed funded by gaddafi and algeria to fight Spanish colonialism, morocco came in the last moment with the green March as spain was leaving claiming the land as its (regular thing for morocco Google greater morocco to see how much they think is their land), morocco devided the land between it and Mauritania but this was fought against by the polizario front,Mauritania was defeated but morocco wasn't, morocco used napalm bombed civilians killed medics and sent civilians into the algerian desert where they still live,also built a wall with the help of Isr*el and apartheid south Africa, The war was put at a pause in 1991 but was continued in 2019 until now.
Morocco has no real claim over the sahara and foreign companies are stealing resources from the land, the people living there are living under apartheid military.
Osetia was attacked by Georgia in 2008 with some episodes like bombing the civilian housing with artillery, but the war was pretty brief because Russia intervened and Georgian army ran on first sign of spetsnaz. The moment Russia would stop watching though, both Osetia and Abkhazia will be invaded by Georgia again.
Transnistria is poorest country in Europe (second poorest now because Ukraine) because it's very small to the point of not being sustainable and is being choked by the imperialist neighbors, currently it's even worse because it's ally of Russia and Ukraine is trying some shit there like terrorism to force Russia to send troops to protect them.