First Sino-Japanese War happened on 1894-08-01.

Second Sino-Japanese War happened on 1937-07-07.

The 1st Sino-Japanese War was 1894-1895. The 2nd Sino-Japanese War was the 1930's (1931, or 1933, or 1937, depending upon which history book you're reading).

The 1st Sino-Japanese War was 1894-1895. The 2nd Sino-Japanese War was in the 1930's (1931, 1933, or 1937...depending on which history book you're reading).

The 1st Sino-Japanese War 1894-1895. The Russo-Japanese War 1904-1905. WW1. WW2 (Reconstruction). The Korean War 1950-1953. The Vietnam War 1961-1975.