The protectionism adds a new kind of tax on the imports called Tariff. With the Tariff, the price of imports is increased, and becomes more expensive than locally produced products. This will protect the domestic economy.
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One of the largest yes, but not the largest. The largest would be the Scandinavian Peninsula.
I can't give all her interactions but her main interaction with the soldiers that came by that got lost in the forest were that she invited the soldiers to come in her house, warm their bodies with her fireplace and give them food to fill up on.
I don't think it would have a direct bearing on the outcome.....