Not the best source, but this is common knowledge in many circles:<p>&quot;In a squad of 10 men, on average fewer than three ever fired their weapons in combat. Day in, day out — it did not matter how long they had been soldiers, how many months of combat they had seen, or even that the enemy was about to overrun their position. This was what the highly regarded Brigadier General Samuel Lyman Atwood Marshall, better known as S.L.A. Marshall, or ‘Slam,’ concluded in a series of military journal articles and in his book, Men Against Fire, about America’s World War II soldiers. &quot;<p><a href="http:&#x2F;&#x2F;www.historynet.com&#x2F;men-against-fire-how-many-soldiers-actually-fired-their-weapons-at-the-enemy-during-the-vietnam-war.htm" rel="nofollow">http:&#x2F;&#x2F;www.historynet.com&#x2F;men-against-fire-how-many-soldiers...</a><p>And:
&quot;This was a problem for the US military and its allies during World War II. New training implements were developed and hit rates improved. The changes were small, but effective.&quot;<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Killology" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Killology</a>