The correct answer to this open question is the following.
The growth of the industry in the United States was dependent upon trade as well as the military power.
Military power has represented a powerful tool for the United States. It has allowed this country to enforce some decisions abroad, it has supported other countries during international armed conflicts, and is a way to establish peace in conflictive nations as well as the protection of the United States.
Trade has been another tool, more civilized and modern, to strengthen the industry in the United States. As an example, we have the North American Free Trade Agreement (NAFTA), signed in 1993 between Mexico, Canada, and the US. The agreement has been revised recently bu the three countries and now has a new name: USMCA, the United States, Mexico, and Canada Agreement.