The 3 Musketeers Bar from M&M/Mars (known as a Milky Way everywhere outside of the US) was introduced to the US way back in 1932. It's name comes from the original design of the product. A three piece, three flavor confection, the 3 flavors being vanilla, chocolate, and strawberry.
And so it remained until 1945 when as a result of the Second World War the price of strawberries went up thanks to the Luftwaffe and their strategic strawberry bombing campaign. This ruthless tactical bombing almost caused the extinction of the US strawberry, and Mars decided to quit using them in their products.