The US army really doesn’t use enough cheap, small drones. All the drones we use are large and expensive.
This is one of many that are publicly acknowledged
https://en.m.wikipedia.org/wiki/AeroVironment_Switchblade
The RQ-11 is a hand launchable drone used by the US (among others) with more than 19k airframes having been delivered.
You don't even need planes to launch them anymore. A HIMARS on the ground is enough and you get 150 km range.
https://en.m.wikipedia.org/wiki/Ground_Launched_Small_Diamet...