These are the pigeons you seek.

After her husband was brutally murdered and she had a few thousand enemy soldiers killed, to make peace Olga asked for a small tribute from each enemy household: 3 sparrows and 3 pigeons.

https://pigeons-of-war.com/2022/07/08/saint-olga-of-kyiv-a-pioneer-of-pigeon-warfare/

Now Olga gave to each soldier in her army a pigeon or a sparrow, and ordered them to attach by a thread to each pigeon and sparrow a piece of sulphur bound with small pieces of cloth. When night fell, Olga bade her soldiers release the pigeons and the sparrows. So the birds flew to their nests, the pigeons to the cotes, and the sparrows under the eaves. Thus the dove-cotes, the coops, the porches, and the haymows were set on fire. There was not a house that was not consumed, and it was impossible to extinguish the flames, because all the houses caught fire at once.

The birds flew home.