Nations including China and Russia will get an inside look at some of the U.S. Navy’s most advanced tactics. Specifically, how the Navy would deal with an alien invasion. If Liam Neeson ran Pacific Fleet. And if the director of “Friday Night Lights” ran everything. It might not be much of an intel edge, but international audiences will be the first to see the Hollywood blockbuster “Battleship,” which debuts overseas in IMAX theaters April 12, according to an IMAX news release. More than 100 international theaters will screen the movie before it hits U.S. cinemas May 18. Gawker Media’s I09…