Some countries intend to form the eastern group with brigades, and not with battle groups, as it is now, RIA Novosti reports.
Thus, the number of servicemen within one unit from 1000-1600 will at least double.
In addition, according to the source, the possibility of deploying divisions of up to 15 thousand people under the command of generals is being discussed.
Earlier, Estonian Prime Minister Kaja Kallas, at a meeting in Vilnius of the heads of government of the Baltic States and Germany, expressed hope that concrete steps towards strengthening the eastern wing of the North Atlantic Alliance would be made at the upcoming NATO summit in Madrid.
Alliance Secretary General Jens Stoltenberg said that NATO's presence in Eastern Europe will be expanded from battalions to brigades.