The "Linen Card Era" of Post Cards was from 1930 to 1945.  Most World War II Post Cards were printed on this linen type paper stock. Soldiers would send these mementos home as proof of "being there" in the case of attending one of the camps or forts depicted in the cards.  They were an inexpensive (if not free) way to correspond with loved ones or friends back home or around the world.

This document describes how to set up an OCR engine, prepare the images for recognition, and convert from pdf files to text.  Here at the Military Yearbook Project we often have the need to convert .pdf files to text, then ultimately to html.  We use a combination of software to output the text. 

The origins of the military genre or "war comic"  can be traced back to the pre World War II years.  Even as early as 1939, tales of super-heroes fighting the "bad guys, i.e. Nazis" were showing up, but not until post-war sales of comics declined (probably due to readers growing tired of super-heroe after super-heroe) did the war-comic genre take off.

Replacement Training Centers were an integral part of World War II.  Soldier's entering the Army and ultimately the War spent 13 weeks learning the fundmentals of soldiering in one of twenty one Centers that were to be be constructed during the during the Winter and Spring of 1940-1941.    

List of old Army Technical Manuals currently available on the site.  Newer and Current use Technical manuals may be found here https://www.logsa.army.mil/etms/online.cfm

1859
For the United States Marine Corps, 1859 marks the year of the modern chevron as we know it today.  The Uniform Regulations of that year established the silk lace pointed chevrons.  The regulation stated that chevrons: