From Twitter
RT @bradyafr
Russian forces in Ukraine have built hundreds of kilometers of field fortifications over the past few months.
This interactive map shows where many of these sites are located and links each to satellite imagery. (1/4)
https://www.google.com/maps/d/edit?mid=1rRKs40IEbGRsV0Fhky25l5OkPJ_vUvQ&usp=sharing