Operation Shadowplay
this Alliance military operation was implemented in order to get supplies and heavy equipment to forces inserted on Imperial-held worlds. Shadowplay used stealth-equipped combat freighters to deliver the supplies. The freighters would skim the atmosphere of a planet, appearing on sensors as a large meteor or asteroid. They would drop the supplies or equipment and then fly off, as if the meteor had disintegrated into several smaller pieces. The "pieces" were often large chunks of ice, in which the Alliance hid the supplies it was delivering. This way, the supplies themselves - whether food or weapons - avoided sensor detection and could be recovered by the on-planet team.