Scrabble?! INFILTRA

Definitions of INFILTRA in various dictionaries:

In warfare, infiltration tactics involve small independent light infantry forces advancing into enemy rear areas, bypassing enemy front-line strongpoints, possibly isolating them for attack by follow-up troops with heavier weapons. Soldiers take the initiative to identify enemy weak points and choose their own routes, targets, moments and methods of attack; this requires a high degree of skill and training, and can be supplemented by special equipment and weaponry to give them more local combat options. Forms of these infantry tactics were used by skirmishers and irregulars dating back to classical antiquity, but only as a defensive or secondary tactic; decisive battlefield victories were achieved by shock combat tactics with heavy infantry or heavy cavalry, typically charging en masse against the primary force of the opponent. By the time of early modern warfare, defensive firepower made this tactic increasingly costly. When trench warfare developed to its height in World War I, most such attacks were complete failures. Raiding by small groups of experienced soldiers, using stealth and cover was commonly employed and often successful, but these could not achieve decisive victory. Infiltration tactics developed slowly through World War I and early World War II, partially as a way of turning these harassing tactics into a successful offensive doctrine. At first, only special units were trained in these tactics, typified by German Stosstruppen ('storm troops'). By the end of World War II, almost all regular ground forces of the major powers were trained and equipped to employ forms of infiltration tactics, though some would specialize in this, such as rangers, commandos, airborne and other special forces, and forces employing irregular warfare. While specialist tactics during World War I, infiltration tactics are now fully integrated as standard part of the modern maneuver warfare, down to basic fire and movement at the squad and section level, so the term has little special meaning today. The only times infiltration tactics are not standard in modern combat is when training is low, such as militia or rushed conscript units like some German Volksgrenadier formations at the end of World War II, or in desperation when an immediate victory is required, such as Japanese banzai attacks. Clandestine, espionage or false flag operations may involve infiltration but this is based on deception, rather than these infiltration tactics, which are based on battlefield maneuver and combat tactics.