The move comes as Russian forces continue to pound Ukrainian cities and villages with missiles and drones, inflicting damage on power plants, water supplies and other civilian targets, in a grinding war that is nearing its nine-month mark.

The Pentagon says the U.S. is sending Ukraine another $400 million in military aid and establishing a security assistance headquarters in Germany.

The Zaporizhzhia Nuclear Power Plant has repeatedly operated on backup generators to cool the reactors and keep other safety systems running until regular power could be restored.

Some of the fresh troops have reportedly been sent to Kherson, on the 684-mile front line.

Monday’s strikes were the 3rd time this month that Russia unleashed massive attacks on Ukrainian infrastructure.