First, look at the conflict currently going on with Iran the U.S. Certainly more to come in the following weeks.

Links - 

https://www.cnn.com/2020/01/07/politics/qasem-soleimani-reasons-justifications/index.html

https://en.wikipedia.org/wiki/Funeral_of_Qasem_Soleimani

https://en.wikipedia.org/wiki/Qasem_Soleimani

https://www.pbs.org/newshour/world/a-timeline-of-u-s-iran-relations

https://www.vox.com/world/2019/7/8/18693297/us-iran-war-trump-nuclear-iraq