Q: Have Douglas fir been used to fight wars?
A: Douglas fir are a type of tree. Douglas fir are used to make ships. The Minesweeper is a small warship made from Douglas fir. The Minesweeper was made of wood to reduce it's risk magnetic signature and likely hood of detonating mines.
The answer is yes.

Q: Did Tony Bennett have more children than he had wives?
A: Tony Bennett had four children. Tony Bennet has had three wives.
The answer is yes.

Q: Was ship that recovered Apollo 13 named after a World War II battle?
A: Apollo 13 was recovered by the USS Iwo Jima. Iwo Jima was captured from the Imperial Japanese Army during World War II by the US in a conflict called the Battle of Iwo Jima.
The answer is yes.

Q: Are paratroopers good at mountain rescue?
A:
A paratrooper is a member of a military unit that deploys parachutes. A PJ is the acronym name for a military parachute jumper. PJs are an elite mountain rescue unit.
The answer is yes.