Which air force has a plain black star on their planes?

i have seen a plane with a plain black star on the side of it. I don't know what kind of plane it is, but it is a small jet (possibly a trainer) and it has a 't tail' at the back. any ideas on the air force or the plane?? any links to pictures of possible planes would be appreciated. thanksWhich air force has a plain black star on their planes?L 29 dolphin



the Czechoslowak jet trainer during the 60ies



there is plenty of them in the US, some being operated in quazi Russian air force marking, including various starsWhich air force has a plain black star on their planes?its maybe a russian mig or a plane that someone has bought and has had it painted the way he wanted

stage stores