THE DESERT AND THE STARS BY KEITH LAUMER - https://www.gutenberg.org/cache/epub/61285/pg61285-images.html

 The Aga Kaga wanted peace—a
piece of everything in sight!

The Boyars have spent sixty years terraforming Flamme," Retief said. "They've cleared jungle, descummed the seas, irrigated deserts, set out forests. They've just about reached the point where they can begin to enjoy it. The Aga Kagans have picked this as a good time to move in. They've landed thirty detachments of 'fishermen'—complete with armored trawlers mounting 40 mm infinite repeaters—and another two dozen parties of 'homesteaders'—all male and toting rocket launchers.