"Greetings (This Is Uncle Sam)" is a 1961 song recorded by three American R&B music groups, The Valadiers, The Monitors, and The Isley Brothers for the Motown label.
[1] It was written by Robert Bateman, Brian Holland, Stuart Avig, Martin Coleman, Art Glasser, Jerry Light, P Bennet, Lawrence Horn and Ronald Dunbar.
The Isley Brothers version was shelved while the Valadiers' and Monitors' versions give both groups their first and only charter on the Billboard Hot 100 charts and became the biggest "hit" for each; both groups could only archive very minor hits due to non-promotion.
The Valadiers and Monitors version also have a Drill Sergeant near the end (played by Valadiers' Jerry Light and Monitors' Warren Harris respectively) barking orders and telling the lead to get in line and march.
[1] The Isley Brothers' version was shelved until 1972, three or four years after they left Motown to restart their T-Neck record label.