Command & Conquer: Red Alert 3/Allied Strategies

Allies vs Empire
The Allies are a well balanced force in Red Alert 3. A strength of the Allied forces is clearly their air superiority. One strategy is that of the Vindicator rush. With the ability to build these aircraft very early in the game, rushing to build an  airfield as soon as possible and blitzkrieg-ing your enemies is a  sure recipe for a early victory. This is really a when facing the empire as their early anti air defenses are weak at best. This strategy is not as useful against the soviets. This make sure you don't fully neglect land defenses because you never want to leave your base fully undefended. Also make sure your opponent hasn't snuck a nano-core to the sea where he/she starts building a secret navy base that will grow and challenge and haunt you in the future.

Allies vs Both
The Chronosphere can be used as a directly offensive weapon - you can use it to destroy enemy land units by teleporting them into the water, or naval units by teleporting them onto land. Amphibious units will be unaffected.

Top Secret Protocols
The surgical strike works great on units, but poorly on structures. If the computer repairs its' structures, or against a human opponent, don't waste the surgical strike on a building unless it's already hanging by a thread. It is much more useful taking out an anti-air structure or heavy tank.

The time bomb cannot be placed directly on top of a structure or unit, unlike air strikes or satellite blasts. It is a chronosphere-transported unit itself, and must be placed in the space between buildings and units. It is also vulnerable to being targeted and destroyed by enemy units, so beware of placing it beside an offensive force run by the computer. A human opponent may not react in time to attack with their units, but the computer is pretty good about it.