Because the Late Roman Empire had several economic, demographics and military problems. Plus the land of Germania was a wild and "poor" land for Roman standards, there wasn't anything to gain from conquering warmongering tribes on the other side of the Limes. Also the Romans thought of Germania as part of the empire actually, just unruled. At least de jure they considered the province of Germania their territory anyways
RPGLover16 t1_irdurao wrote
Reply to Why didn't the late Roman Empire fund campaigns across the Rheine? by LuminousNutria
Because the Late Roman Empire had several economic, demographics and military problems. Plus the land of Germania was a wild and "poor" land for Roman standards, there wasn't anything to gain from conquering warmongering tribes on the other side of the Limes. Also the Romans thought of Germania as part of the empire actually, just unruled. At least de jure they considered the province of Germania their territory anyways