Like the other Allied governments, the Soviets soon abandoned tabun (GA) for Sarin (GB) and Soman (GD). Large quantities of the German-manufactured agent were dumped into the sea to neutralize the substance. Since GA is much easier to produce than the other G-series weapons and the process is comparatively widely understood, countries that develop a nerve agent capability but lack advanced industrial facilities often start by producing GA. During the Iran–Iraq War of 1980 to 1988, Iraq employed quantities of chemical weapons against Iranian ground forces. Although the most commonly used agents were mustard gas and sarin, tabun and cyclosarin were also used. Tabun was also used in the 1988 Halabja chemical attack. Producing or stockpiling tabun was banned by the 1993 Chemical Weapons Convention. The worldwide stockpiles declared under the convention were 2 tonnes, and as of December 2015 these stockpiles had been destroyed.