Answer:
The speech was made outside in the open air to accommodate the vast crowd that had come to hear him. Urban II's sermon proved highly effective, as he summoned the attending nobility and the people to wrest the Holy Land, and the eastern churches generally, from the control of the Seljuk Turks.
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Historians often rely on both primary and secondary sources when supporting an argument, since it's important to use secondary sources to put the argument in context, and primary sources in order to make an original point.
Tariffs on imports
The 1920s presidents began a system of tariffs on imported good to encourage spending on American goods only. However, with no trade, European countries were unable to make money.
Tariffs are taxes on imported goods. This is a common economic policy of conservatives.
You have to be more specific hon if you want me to answer the question