Why do veterans of Iwo Jima always refer to the soft black sand of iwo

The soft black sand is called 'uzura seki' in Japanese, is regarded as consecrated soil, imbued with the blood of about 21,000 Japanese servicemen who perished in the six week long 1945 battle.

Explanation:

The battle of Iwo Jima happened during the World War II between the United States and Japan. The Island of Iwo Jima was a strategic location that the United States used for fighter planes and bombers to land and take off when attacking Japan. The sand of Iwo Jima was the first obstacles that the armies faced. They faced 15-foot-high slopes of soft black volcanic ash.

The American army were bogged down in the soft black volcanic ash of Iwo Jima and this helped the Japanese.

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