The German armed forces were withdrawing an entire armoured infantry platoon from a NATO mission in Lithuania and the troops are due to return to Germany on Thursday, following suspicions of serious misconduct.
The main soldier who was accused may also be subjected to summary dismissal under the soldiers act, the defence ministry said on Wednesday.
The Military Counterintelligence Service (MAD) was also involved in the investigation.
Investigations have already revealed initial suspicions of criminal offences from sexual assault to insults that could be based on racism, coercion and extremist behaviour.
Right-wing extremist and anti-Semitic songs were sung at a party in a hotel at the end of April, according to the Spiegel news magazine, which first reported on the case.
An alleged sexual assault was also filmed.
Defence Minister, Annegret Kramp-Karrenbauer, has pledged to hold others accountable if they held information that they failed to share.