The definition of preemptive is  something done in anticipation of another action or done to prevent something from happening. When the military takes action against forces they believe intend to do harm to them, this is an example of a preemptive strike.
Newsfront. Just 1 percent of illegal immigrants living in the United States last year were deported-a dramatic 25 percent drop from the previous year-a change the Obama Administration says is on purpose due to a shift in focus. illegal,immigrants,deported,drop. 400.
New arrivals are offset by the roughly 300,000 immigrants who return home each year and annual natural mortality of about 300,000 among the existing foreign-born population. 2 As a result, growth in the immigrant population was 3.8 million 2010 to 2016. 3