• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 4 · Society, Civilization, Culture
• 45 · warfare; military affairs
• 45G · defensive measures (military)
• 45G1 · cutting communication lines and making obstructions
• 45G12 · obstructions, barricades (defensive measures)
• 45G121 · obstructions ~ army

45G1212 · man-trap, caltrop, spikes ~ obstruction on roads

• 45G12121 · pitfalls
• 45G12122 · land-mines, mine-field