Will there be a lethal confrontation between the national military forces of Iran and the United States before 1 January 2019?
A lethal confrontation is one that results in at least one fatality for the national military forces of either side. For the purposes of this question, Iran's national military forces include the Revolutionary Guard Corps, including Quds and Basij (The Iran Primer, Council on Foreign Relations, Middle East Institute).
This question should close as "No" with an end date of 12/31/2018. There were no verifiable fatalities resulting from a confrontation between the US and Iran over the duration of this question.