During the suzerainty battles of the period 1592–1620, the Mainz forces occupied and severely aggrieved the community.
In the ensuing Thirty Years' War, the village also suffered, with the dragoons and their horses beggaring the community.
[1] The village church edifice, like so many in the region, dates from the century after the Thirty Years' War.
In 1907 the Garte Valley Railway (Gartetalbahn) was extended from Rittmarshausen to Duderstadt, taking in Beienrode.
Pursuant to the redistricting law of 1972, on New Year's Day 1973 Beienrode became part of the new Gemeinde Gleichen.