True . . .

Three months before the planned invasion date (e.g. just enough time for the information to arrive at the target world as part of routine news sources), the military forces of the invader promulgate a set of new uniform regulations. These regs just *happen* to use a popular line of commercial outdoor clothing widely available on the target world as the basis for field dress uniform. The various unit/rank badges are the only things which set this apparel apart as military rather than commercial, with said badges equipped with quick-attach/release capability (ostensibly for protection against snipers picking out high-rank targets). Blank badges are shipped to the force members as commercial cargo (a cover company having been set up which uses the blank badge shape as it's logo), to be completed on site and carried at all times during the final stage of invasion preparation.

"Bullocks! We're going to be captured! Quick! Slap on your badges!"