Across
- 4. Known also as the Flying Fortress ,the A four-radical-engined heavy bomber with a powerful battery of machine guns, designed by the United States for WW2.
- 5. Used during night combat that contained small amounts of flammable material that left a phosphorescent trail once shot out of a gun.
- 6. A powerful German submarine used during World War 1 against the English to starve Britain's population by using blockades as the English would get all their food supplies from boats.
- 8. A emerging technology used very prominently in WW2, that would guide assist submarines and ships through the ocean as it it would pick up the location of nearby objects in the oceans.
- 9. A cigar-shaped self-propelled underwater missile designed to be fired from a submarine then to explode upon reaching its target.
- 10. Known also as Q-boats, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks.
Down
- 1. A military aircraft designed primarily for air-to-air combat against other aircraft.
- 2. Portable x-ray equipment used on the battle fronts to save lives directly as a result of injuries and to prevent a spread of infection from foreign object inside the body.
- 3. A language developed so each side could send secret messages that couldn't be deciphered by the enemy side.
- 7. Were used in World War 1 as they carried supplies and increased mobility for soldiers to move quicker to the fronts, but continued to be used and upgraded to be faster and became a major military force in WW2.