• 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)

45G2 · (military) self-protection

• 45G21 · underground shelters
• 45G2(+0) · (military) self-protection (+ variant)
• 45G2(+1) · (military) self-protection (+ during the battle)