Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_2402864_1 (year INTEGER, regular_season VARCHAR, league VARCHAR)
### Question:
What was the earliest year where USL PDL played in 3rd, Southeast season?
### Answer:
SELECT MIN(year) FROM table_2402864_1 WHERE regular_season = "3rd, Southeast" AND league = "USL PDL"