barb
barbed
barrier
blue
bobbed
border
boundary
camp
capture
concentration
czech republic
danger
dictatorship
district
entry
fascism
fence
frontier
holocaust
iron
iron curtain
metallic
military
mine
minority
prison
prisoner
protection
rebellion
refugee
rural
scary
security
sharp
sign
sky
soviet
steel
stop
submission
symbol
territory
torture
trench
tyranny
victim
war
warfare
wire