Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Week | Date | Opponent | Result | Game site | Attendance |
| --- | --- | --- | --- | --- | --- |
| 1 | September 11, 1960 | at New York Titans | L 27–3 | Polo Grounds | 10,200 |
| 2 | September 18, 1960 | Denver Broncos | L 27–21 | War Memorial Stadium | 15,229 |
| 3 | September 23, 1960 | at Boston Patriots | W 13–0 | Nickerson Field | 20,732 |
| 4 | October 2, 1960 | Los Angeles Chargers | L 24–10 | War Memorial Stadium | 15,821 |
| 6 | October 16, 1960 | New York Titans | L 17–13 | War Memorial Stadium | 14,988 |
| 7 | October 23, 1960 | Oakland Raiders | W 38–9 | War Memorial Stadium | 8,876 |
| 8 | October 30, 1960 | Houston Oilers | W 25–24 | War Memorial Stadium | 23,001 |
| 9 | November 6, 1960 | Dallas Texans | L 45–28 | War Memorial Stadium | 19,610 |
| 10 | November 13, 1960 | at Oakland Raiders | L 20–7 | Kezar Stadium | 8,800 |
| 11 | November 20, 1960 | at Los Angeles Chargers | W 32–3 | Los Angeles Memorial Coliseum | 16,161 |
| 12 | November 27, 1960 | at Denver Broncos | T 38–38 | Bears Stadium | 7,785 |
| 13 | December 4, 1960 | Boston Patriots | W 38–14 | War Memorial Stadium | 14,335 |
| 14 | December 11, 1960 | at Houston Oilers | L 31–23 | Jeppesen Stadium | 25,243 |
| 15 | December 18, 1960 | at Dallas Texans | L 24–7 | Cotton Bowl | 18,000 |
Question:
what date was the first game at war memorial stadium?
Answer:
September 18, 1960