Last Updated：2025/12/19
Sentence
In
the
American
steel
industry,
only
two
labor
organizations
were
of
any
great
significance
in
the
late
19th
and
early
20th
centuries.
These
were
the
Amalgamated
Association
of
Iron,
Steel
and
Tin
Workers
(The
A.A.),
and
the
Knights
of
Labor.
The
A.A.
was
formed
in
1876
when
the
United
Sons
of
Vulcan,
composed
of
iron
puddlers
and
boilers,
joined
forces
with
several
smaller
unions
of
rolling
mill
hands
and
other
skilled
iron
workers.
Quizzes for review
In the American steel industry, only two labor organizations were of any great significance in the late 19th and early 20th centuries. These were the Amalgamated Association of Iron, Steel and Tin Workers (The A.A.), and the Knights of Labor. The A.A. was formed in 1876 when the United Sons of Vulcan, composed of iron puddlers and boilers, joined forces with several smaller unions of rolling mill hands and other skilled iron workers.
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