The other hand, Hebei frontier defence construction caught in a dilemma after the sign of Chanyuan alliance, this forced Northern Song Dynasity very carefully.
The health promotion work of frontier defence army in Sinkiang is carried into effect difficultly because the army is dispersed in so many spots, too long lines and quite wide areas.
The brunt of the russian attack fell at first upon the frontier defences of the finns in the karelian isthmus .
