system
Given the following post, respond as if you're commenting on Reddit:
human
[guardians of the Galaxy] was Rohan a special Kree in any way ?

Are all Kree as strong or stronger than Cap. Looking at the people of Zandar it seems like the Kree would massacre them in any war if all Kree were as strong as Rohan. 

Also why didn't any Kree follow Rohan or serve  in his army ? 

Also how didn't the nova corps not detect Rohan's ship way before it got to Zandar.
gpt
Answering per-question:

> Are all Kree as strong or stronger than Cap.

Kree in general are much physically stronger than humans, yes, though typically not so much as Steve Rogers post-operation. To be fair, Ronan and his men were at least partially involved in the Kree military, so they have that going for them.

> Looking at the people of Zandar it seems like the Kree would massacre them in any war if all Kree were as strong as Rohan.

Luckily for the population of *Xandar*, sufficiently-advanced technology means that most confrontations are solved in a gunfight or in starships; physical strength is certainly an advantage, but it's far from everything when your society is at that technological level.

> Also why didn't any Kree follow Rohan or serve in his army?

Many did, but *Ronan* was an extremist and Kree supremacist exiled from Kree society as a whole for political reasons and because he was somewhat genocidal; public Kree opinion of *Ronan* is fairly low as of his dealings with Thanos and assault on Xandar.

> Also how didn't the nova corps not detect Rohan's ship way before it got to Zandar.

A combination of cloaking and the fact that most of the Nova Corps are out on missions or patrols to other planets at any given time; *Xandar* may be where their heads of operations are, but they generally can't amass an invasion-repelling army within a day's notice. What little of their forces were on-planet at the time were necessary to defend the capital directly. *Ronan* was prepared; the Nova Corps was not.

*EDIT: Typos.*