Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The men's 4 x 400 metres relay event at the 1948 Olympic Games took place on August 6 & August 7. The United States team easily won the final with a time of 3:10.4. At the 1948 Summer Olympics in London, 33 athletics events were contested, 24 for men and 9 for women. Three events made their Olympic debut at these Games: women's 200 metres, women's long jump and women's shot put. There were a total number of 745 participating athletes from 53 countries.