Ohma-D'un, also known as the Water Moon, was the largest moon of Naboo. In 32 BBY, following their newfound alliance with the Human people of Naboo, the Gungans established a settlement on Ohma-D'un, bringing multiple specimens of vegetal and animal life to populate the otherwise uninhabited moon. Ten years later, in the early days of the Clone Wars, the Confederacy of Independent Systems used a gas weapon on the moon, killing many of the Gungan colonists in the process.