The findings exonerated Judgment_communication the ARVN soldiers from charges that they had used Using poison or mustard gas .

The Germans used Using mustard gas for the first time , supported Supporting by a mass of heavy artillery and captured Conquering part of the bridgehead over the Yser and annihilated two British battalions .

Moreover , the Japanese dared Risk not use Using mustard gas here as they did elsewhere in Shanghai , in full view of the foreign powers .