During the 1930s and 1940s, significant improvements were made to the ground, making it one of the largest in the country at that time. In 1938 the highest attendance to date at the ground was recorded at over 75,000 for a FA Cup match against Aston Villa. During the 1940s and 1950s the attendance was often above 40,000, and Charlton had one of the largest support bases in the country. However, after the club's relegation little investment was made in The Valley as it fell into decline.
During the 1930s and 1940s, significant improvements were made to the ground making it one of the largest in the country at that time. In 1938 the highest attendance to date at the ground wa.s recorded at over 75,000 for a FA Cup match against Aston Villa. During the 1940s and 1950s the attendance was often above 40,000, and Charlton had one of the largest support bases in the country However, after the club's relegation little investment w,as made in The Valley as it fell into decline.