sentences:  Prior to the revolution, Iran had had 1,700 tanks (which dwindled to 1,000 usable ones after the revolution).With their defeat at Dezful, approximately 17% of that entire force was destroyed, a major weakening of Iranian military power.To make matters worse, with US-led sanctions on Iran, those tanks could not be replaced while the Iraqi ones could easily be (since they weren't under an embargo and had the support of the west).