A free app for Android, by Very Important Apps.

This is a collection of stickers for WhatsApp, with different themes, including military themes. It is a free app for Android devices.

In addition, it contains different sections, with different categories, such as military, weapons, symbols, and others. Each category contains several stickers. You can also add your own stickers to the collection.

This application was designed to be easy to use. In fact, the whole idea behind it is to make the process of sending stickers to your friends as simple as possible. 

So, just download this application on your device and start using it. The whole process is very simple, so there is no need to explain it in more detail.