In a few sentences, using evidence from the text, summarize this section of the essay:
Series after series of posters directed employees to
get to work, anything less was tantamount to
treason. Employers did not necessarily expect their
workforce to take all poster slogans literally. Rather,
businesses placed these displays at the scene of
production to create an atmosphere of unity and
urgency. Posters called upon workers to conserve,
keep their breaks short, and follow their supervisors'
instructions. The main thrust was to convince
workers, many of whom participated in the violent
labor conflicts of the 1930s, that they were no longer
just employees of GM or US Steel, but rather they
were Uncle Sam's "production soldiers" on the
industrial front line of the war.
The posters did not carry the message that hard
work would result in personal or company gain. The
motivation was purely patriotic duty. Many posters
also played directly on the guilt of those who were not
in the military by reminding workers that, if they were
not risking their lives on the battlefield, the least they
could do was keep their bathroom breaks short.
Posters castigated workers for punching in late,
taking long breaks, damaging the company's
equipment, and even drinking after work. Artists
turned what had been considered common