Emergency Reinforcements

When certain areas on the map are invaded, additional reinforcements are released to the defending side. For the Allies this may include a reinforcement convoy, which disbands soon after and releases a large number of devices and planes into the pools.

Note that in games against Allied AI reinforcements arrive to mainland bases. E.g. all India reinforcements appear in Karachi, with Karachi-bound division appearing on the next turn after the invasion, while all other units arriving the day after that.

Australia
Activation area: The Australian mainland one hex South of Brisbane and Tasmania. 

Reinforcements triggered: Reinforcement Convoy:

India
Activation area: The Indian mainland, the trigger line is one hex South of Delhi

Reinforcements triggered: Reinforcement Convoy:

New Zealand
Activation area: Invasions on both New Zealand islands will trigger invasion reinforcements

Reinforcements triggered: Reinforcement Convoy:

West Coast
Activation area: Mainland USA and the islands in front of Los Angeles. Invasions in Alaska and Canada will not activate the reinforcements.

Reinforcements triggered: Reinforcement Convoy:

Air Units: The invasion of the American West Coast will also trigger the early arrival of many American and Canadian air units. Tests show about 90 air units showing up when the West Coast is invaded at the end of March.

Japan
Activation area: Any of the main Japanese Home Islands will trigger the invasion reinforcements. Paramushiro-Jima is also a trigger base.

Reinforcements triggered: