Dumb
(Calling reinforcements, considering the the fold tech, yes, however bringing them here will require you to move them through the entire field again. Unless you want to grill them and taint their origin point with Cult-subspace particles. Also, is the pulse radial or linear? Oh and if you call too many or too big reinforcements they will have issues going through the field, logically.)
...as they started gathering data, they found no remnants of any shells or particles that could´ve been used to deliver a force, so the bombardement was either done with laser or energy weaponry, which also got excluded due to the lack of burnmarks, or the kinetic force was somehow delivered without any proxy, which would be...rather odd, to put it simply. The planet itself seemed to emit negliegable amounts of radioactivity, which would either suggest that one of the two sides used nuclear weaponry at some point, or a potential former sun had fried the planet with solarwinds Apart of that not much could be found...Brera paused for a moment...not much could be...then he got it. There was no remnant of any sort of sentient life on the planet, while flesh and similar things might´ve rotted in the early days the bones should theoretically have survived, considering the planet had no atmosphere anymore...