Homeworld Gems invade Europe I Humans Vs. Gem (fictional) war

Notes:

So me and my friends came up with an idea about a fictional war. Homeworld Gems invade Earth, invading from the south up to the north. Humanity finally manages to halt them at the mediterranean sea. By now the Homeworld Gems have enslaved humans and used them as Disposable Soldiers. I will be posting North America and the rest soon. I am not that good with SU canon so I may be wrong with this stuff. Yes, I know the Homeworld Gems have "Unstoppable" Technology, but knowing stories like this the good guys always win.