The whole Kosovo thing was about creating military bases on Kosovo and smuggling Afghan heroin from Turkey into Europe. They slowly started pulling out of Kosovo after they pulled out of Afghanistan, but Albanians took that as an opportunity to even more blatantly break treaties, and Serbs started getting riled up because on top of all the bullshit they're also occasionally getting shot at in the streets. So now USA is sending in some NATO big shots to do something (probably prove that shooting at Serbs is genocide against Albanians or some other bs).