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<ul><li><b>Scope and content:</b>  Original Caption: Testing caterpillar ammunition trailer and tractor.  Two and a half ton caterpillar ammunition trailer designed for the U.S. Ordnance Department and built at the Peoria, Ill., plant of the Holt Manufacturing Company, being hauled uphill by a 10-ton, 55 H.P. caterpillar tractor on a test run.</li></ul>
Photographer: the Holt Mfg. Co.</div>
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Unknown author<span style="display: none;">Unknown author</span> or not provided</div>
<a href="https://en.wikipedia.org/wiki/U.S._National_Archives_and_Records_Administration" class="extiw" title="en:U.S. National Archives and Records Administration">U.S. National Archives and Records Administration</a>