German on Syria terrorism charges
Federal prosecutors said the 20-year-old, identified only as Kreshnik B in line with German privacy rules, has been charged with membership of the Islamic State of Iraq and the Levant (Isis), which they say he joined in July.
He has also been charged with conspiring to commit an attack because he is accused of undergoing weapons training, acquiring a firearm and participating in fighting in Syria.
He was arrested in December after he returned to Germany.
Germany and other European countries are increasingly worried about the possible security threat posed by radicalised citizens returning from Syria and Iraq.