What Ivy college football teams won in the 1940s

1940-Pennsylvania (5-0-1)
1941-Pennsylvania (6-1-0)
1942-Navy (4-1)
1943-Navy (4-0)
1944-Army (3-0)
1945-Army (2-0)
1946-Yale (4-1-1); Harvard (3-1-0); Penn (3-1-0)
1947-Pennsylvania (4-0)
1948-Cornell (4-0)
1949-Cornell (5-1)