Speaking on West Ham's official site, manager Slaven Bilic said;
"This is a fantastic opportunity for Reece to continue his development and experience top level European football on a regular basis.
"He will play in a league which is very technical, which can only help him immensely, and he will also learn a new culture and gain valuable life experience.
"We believe Reece has a very exciting and successful future here at West Ham, and he now needs regular first team football to ensure his progress continues.
"We wish Reece all the very best in this adventure, and look forward to welcoming him back to the Club at the end of the season."
The main concern surrounding Reece is his lack of actual playing time at the moment, however once given time to find his niche in a tough league, regular starts could see the move benefit West Ham in the long-term, as the young star continues his development.
However, Hammers fans may feel aggrieved by the decision to let the youngster go out on loan once more, after an unsuccessful spell with Jaap Stam's Reading last season. I sincerely hope this move benefits the young mans skill-set, confidence and overall ability.
It's time to prove to Slaven what he'll be missing this season.
We wish you all the best with Mönchengladbach over the coming year!