The Roman Empire From Severus To Constantine Instant
Germanic tribes crossed the Rhine and Danube, while the Sassanid Persians pressured the East.
The collapse was halted by , a pragmatic reformer who realized the empire was too large for one man to rule. He established the Tetrarchy (Rule of Four), dividing the empire into Eastern and Western halves, each governed by an "Augustus" and a junior "Caesar." The Roman Empire from Severus to Constantine
The silver content of Roman coins dropped to nearly zero. Germanic tribes crossed the Rhine and Danube, while
