SEAL Team 6, the predecessor to DEVGRU participated in the US invasion of Grenada. The SEALs two primary missions were the extraction of Grenada’s Governor-General and the capture of Grenada’s only radio tower. Neither mission was well briefed or sufficiently supported with timely intelligence and the SEALs ran into trouble from the very beginning. One of their two transport planes missed its drop zone and while making an airborne insertion with their boats off the coast four SEALs drowned in a rain squall. Their bodies were never recovered.
After regrouping from their initial insertion the SEALs split into two teams and proceeded to their objectives. The SEALs at the Governors mansion realized after digging in that they had forgotten their SATCOM gear on the helicopter. After being surrounded by BTR-60s and a substantial number of Grenadian and Cuban troops the SEALs only radios ran out of battery power. Using the land line telephone in the mansion the SEALs called in AC-130 fire support. The SEALs were pinned in the mansion overnight and were relived and extracted by a group of Force Recon Marines the following morning.
The team sent to the radio station also ran into communication problems. As soon as the SEALs reached the radio facility they found themselves unable to raise their command post. After beating back several waves of Grenadian and Cuban troops supported by BTR-60s the SEALs decided that their position at the radio tower was untenable. They destroyed the station and fought their way to the water where they hid from patrolling enemy forces. After the enemy had given up their search the SEALs, some wounded, swam into the open sea where they were extracted several hours later after being spotted by a reconnaissance plane.