[3] The M138, like its parent cluster bomb and all BZ munitions, were stored at Pine Bluff Arsenal in Arkansas.
[5] The M138 was the subject of various tests, including those to determine its effectiveness and its detonability as demilitarization plans for BZ weapons ramped up during the 1980s.
[6] Regardless, an Army report issued on the results of the testing emphasized that extreme care must be exercised in order to prevent accidental detonation of the M138 bomblets as they were destroyed.
[7][8] These tests, known collectively as "Tall Timber" were carried out from April through June 1966 at the Waiakea Forest Reserve near Hilo, Hawaii.
[8] The purpose of the Tall Timber tests was to determine the effectiveness of BZ-filled M138 bomblets in a tropical forest environment.