India's "golden age" began as direct result of

an increase in trade.

Explanation:

The golden period of India occurred with the beginning of the Gupta Empire. This period was marked by great peace and prosperity, where India began a series of discoveries, scientific, technological, linguistic, artistic, literary, philosophical, religious, among others. All of this was thanks to the period of peace and increased trade, which provided the period in which the Indian population went unhindered.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).

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