The Allies – pushed out of Europe and besieged on many fronts (even in the continental United States) seem to be the weakest of the blocs at the moment. The 1947 enemy offensives led to the loss of the British Isles (desperate defense keeps the enemy at Hadrian’s Wall at bay). That loss had a strong effect on the alliance, leading to nervous situations and increased tensions between the allies. Each participant wants freedom and security for their country. And these are difficult to find during the difficult months of 1947 ..
One of the most important assets of the Allies is their industrial base. It allows to cancel the technological superiority of the Axis with the number of vehicles produced. Thanks to it, the Allies maintain the largest air fleet on the planet, allowing them to supply units in full encirclement.
The main advantage of the Allied army is its high mobility and versatility (most medium vehicles have at least 2 machine guns that allow easy removal of enemy infantry). They are also the only force to be able to field huge vehicles. And they have a large amount of specialized infantry units. Allied secret weapon: the phaser hits the targets with the condensed energy voltage, ignoring the coverage.
The Babylon operation took the Marines to the Middle East. These units are based on a heavy support of walkers and on a slightly armored infantry. These units have a lot of firepower and are able to do much damage to the enemy in a short time.