When did the Romans invade sarmatia?

The Romans began their incursions into Sarmatia around the 1st century BC, with significant military campaigns occurring during the reign of Emperor Augustus in the late 1st century BC. The most notable Roman engagement in Sarmatian territory occurred during the campaigns of Emperor Trajan in the early 2nd century AD. However, the Romans never fully conquered Sarmatia, and their influence in the region remained limited.