Operation Conservation happened on 1990-05-06.
To teach conservation principles.
There are several conservation laws in physics, and many of them tell an astronomer what is, and what isn't, possible. This can help explain how certain things happen, or even predict what will happen. Among the laws of conservation that are relevant in astronomy are: conservation of mass; conservation of energy; conservation of momentum; conservation of rotational momentum; conservation of charge.
Operation Rumford happened in 1944.
Operation Mo happened in 1942.
Operation Diesel happened in 2009.
Operation Bruilof happened in 1978.
Operation Kremlin happened in 1942.
Operation Wikinger happened in 1940.
Operation Atalanta happened in 2008.
Operation Gericht happened in 1916.
Operation Jumelles happened in 1960.
Operation Sandcastle happened in 1955.