Why Voiken?

A combat mech was designed according to vastly different criteria from a true law enforcement mech.

The former was designed to end a fight in the most overwhelming means possible.

The latter was designed to end a fight in the least violent way possible.

The difference in goals already produced a divergence in the requirements, development and outcome of a law enforcement mech.

A machine that possessed no subtlety at all and could only solve problems in the most blunt and destructive means possible would fit right at home in most battlefields!

Collateral damage was a secondary concern to beating the snot out of the enemy!

Naturally, such combat engines were completely unsuited to be employed in peacekeeping jobs. The governments and organizations hired and funded the Planetary Guard organizations in order to preserve the order and safety of their planets.