I want to know the answer to the following question:
Why did Iran have to build its own military hardware, vehicles, and weapons after the 1979 Revolution?
All the background I'm provided with is that "Since the 1979 Revolution, to overcome foreign embargoes, Iran has developed its own military industry, produced its own tanks, armored personnel carriers, guided missiles, submarines, military vessels, guided missile destroyer, radar systems, helicopters and fighter planes.". Is that enough to answer the question?
Answer: yes