A a0 is an armed ship owned by private persons and holding a government commission to attack and capture.

Privateer, is the right answer.

Explanation:

A privateer is any person or ship that engages in naval combat following a board of war. The Commission approves that individual to bring on all sorts of resentment permissible at sea by the precepts of war, that includes invading alien crafts throughout wartime and taking them as bonuses. During the war, aquatic reserves were subject to operations on the ground so privateering was a method of promoting state government by concentrating loaded crafts and privateers.

A privateer is an armed ship owned by private persons and holding a government commission to attack and capture.

Privateers only engage in maritime warfare if there's a war commission. Privateers cannot get their compensation if they cannot seize an enemy's assets.