Here is a rugged unmanned ground vehicle ready for combat. The Milrem THeMIS UGV is a tracked hybrid infantry system with a modular design. It can be enhanced with various modules to take on search & rescue, transport, and reconnaissance missions. The base measures 2000mm long and 900mm high. It has a max payload of 750kg.
This UGV has a remote control system and can follow its operator. It also works with other UGVs. This video shows what you can do with a HeMIS unmanned ground vehicle with a deFNder remote weapon station.