[1] Most cash drawn by soldiers would go directly into the local economy, and in a damaged economy the effects of a hard currency such as the dollar circulating freely alongside weaker local currencies could be very problematic, risking severe inflation.
[3] The high purchasing power of the dollar, and its easy transference back to the United States, also posed a significant incentive to black-marketeering.
[4] However, whilst the use of local currencies was effective where they were provided in cooperation with the local authorities, it was impractical in combat zones where the government might be hostile, deliberately ambivalent, or simply non-existent.
In these cases, the military authorities issued special "military currency", which was paid out to soldiers at a fixed rate of exchange and simply declared legal tender in occupied areas by local commanders.
Notes today are fairly common, and can be valued anywhere from one dollar (for a common bill) to a couple thousand dollars for a rare series, low printing, or replacement bill.