Planetary Garrison is a group of 4 techs very similar to each other. Their only dependence is Self Defense for the first one, and the prior Planetary Garrison tech for the other ones, so they can be researched linearly. They determine max troops on planets, overriding the effect of any prior techs in the list.
|Self Defense||1 RP||2|
|Planetary Garrison 1||10 RP||5|
|Planetary Garrison 2||30 RP||10|
|Planetary Garrison 3||100 RP||15|
|Planetary Garrison 4||300 RP||20|