What is Reddit's opinion of Army ROC-V?

From 3.5 billion Reddit comments

As other have said it is a training aid for the recognition of armored vehicles. Pretty cool find.

If you are curious, the current method the US Army uses is a program called Recognition of Combat Vehicles (ROC-V). It is integrated in Army vehicle systems for quick reference and was even released as an app a few years ago (https://play.google.com/store/apps/details?id=gov.usa.rocv&hl=en). Pretty much the same as the cards, but there are modern details such as the vehicle's signature when viewed under thermal optics.

You can download the ROC-V app from the Maneuver Center of Excellence here:

https://play.google.com/store/apps/details?id=gov.usa.rocv