How many roman emperors ruled during the 50-year period

There were no less than 22 roman emperors who ruled during the 50-year period

The embargo act of 1807  was a law passed by the united state congress and signed by president thomas jefferson on december 22,  1807. it prohibited american ships from trading in all foreign ports. in 1806, france passed a law that prohibited trade between neutral parties, like the u.s., and britain.