opens a box of dirt roads with shellholes and tread marks on them.
From MicroMark Army Lists
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BKCBN169 – Bulgarian 9th Infantry Division, Screening Army, south-east Bulgaria, May 1940
The Screening Army was a force deployed facing the Turkish border, whose component units changed frequently. In May 1940, the 9th Infantry Division was deployed there, as depicted here, in BKCIV format.