Valkaryia Forces

"'Though we may address them as Valkyrians, we do not know their true Alias. For all you know, they might be calling us hairless monkeys!' - U.N. Security Council President, Whitney Huntsman"

Origins
The name "Valkaryia" stems from the appearance of the Aliens with their distinctive "Valks" at the top of their skulls. The terminology for the aliens was officially recognized by the U.N. in August of 2037, following the Alien's annexation of the Persian Gulf.

It was hypothesized by the Science & Research community that the Valkers originated from Proxima Centauri B, located 4.2 light years away. Seeing that the aliens aren't too far ahead compared to us humans in technological capabilities, it was quite a reasonable assumption as to why they would choose to colonize Earth.

Flag
It is a symbol that is commonly seen on Valkaryian Infantry and vehicles. We can assume that this is either their Coat of Arms or their flag.

It is not confirmed that this symbol is their so called "flag"

The symbol displays 7, 3-pointed jagged "V" patterns originating at a center located slightly towards the left.

Weaponry
Particle-Based Weapons such as Particle-Accelerator cannons, Particle Disintegrator rifles and Anti-matter explosives.

Their main propulsion systems comprises of Anti-matter and Nuclear energy.

On top of powerful ranged weaponry, each Valkaryian soldier is equipped with a plasma cutter, which can be re-purposed into a tool or a weapon at will. This allows them to slice through fortifications at an alarming speed.

Anatomy
The Valkaryians are Avian in nature, which means that they are related to birds. Though they are flightless, they do possess a tough beak made out of a type of carapace (same material found in shells of crustaceans). To prevent them from UV burns on their home planet, their skin is of a light tan color which reflects 89% of UV rays it encounters.

Valkaryians are a carbon-based lifeform (same as humans) which means that they are able to absorb nutrition from Earth's food. Their blood is a dark-violet color which is due to the presence of Anthocyanins. There is no evolutionary benefit of having Anthocyanins in their blood and Scientists are unsure as to why it is present.

They stand roughly 1.78m-1.85m (5ft 10in - 6ft) tall. They are physically as strong as a human male of average build.

Being an Avian species, their bones are lighter than a human's and do not require large amounts of forces to break/snap. However, they rely on their tough beak for hand-to-hand combat which is capable of penetrating a human's skull.

Equipped with a pair of hands with opposable thumbs and 3 fingers on each hand, they are ambidextrous unlike humans who are left/right handed. Valkaryians are only able to see through the UV spectrum of light. Scientists are again, unsure as to why this is the case as they are likely to have evolved in an environment with water which appears opaque under the UV, but it could be due to the abundance of Ultraviolet rays emitted from Proxima Centauri (Star).

Their spinal cord appears to have a C-shaped curve in contrast to a human's S-shaped curve, giving them a hunched-back stature.

Though it was not observed, it is assumed that their method of reproduction is done through the eggs laid by the females.

It is assumed that they have a brain with 2 hemispheres for basic motor functions and logic skills.

Further research on Valkaryian chromosomes gives us a rough estimate for their lifetime which is around 110-140 years. Their biological aging process is slower but more intense than a Human's.

Technological Edge Over Humans
Valkaryia stands at a Type 1.3 on the Kardashev Scale

Humanity, for comparison stands at a Type 0.87 civilization

The Valkyrians have been observed using Particle-Based weaponry as well as Anti-Matter propelled vehicles which gives them an edge over humanity due to their highly destructive nature.

Further research on Infrared mapping of Valkaryian motherships shows that they had mastered Slip-Space technology which proves that interstellar travel is indeed possible.

It was also speculated that the Valkaryians were 70-80 years more advanced than Humanity which meant that the two belligerents were at a toe-to-toe scenario in a conflict.

In most cases, Valkaryians have a Kill to Death ratio of 1:5. That means that for every 1 Valkaryian killed, 5 Humans would have been killed. Valkaryian Heavy armored vehicles have a disturbingly high K/D Ratio of 1:8 as their armor tough to penetrate and hardly creates any spalling when broken.

Disadvantages
Being located 4.2 light years away, all Valkaryian reinforcements have to spend time to resupply and re-arm their numbers again. This gives humanity an opportunity to push forwards in hopes of creating a stalemate that would give rise to precious time needed to negotiate with the Valkaryians (If possible)

Humanity has the numerical superiority in this case as the Valkaryian forces are not able to transport vast amounts of troops in a short period of time. However, the technological advantage the Valkaryians have over Humans as well as the recent events of World War III would place Humanity at a slight disadvantage, leveling the playing field.

The Valkaryian Forces do not possess any Naval Strength as they would need extra effort in Researching Earth's oceanic environments. Therefore leaving ground troops vulnerable at coastal areas as the Human Navies are able to engage safely. Despite having no Navy, the Valkaryians do possess Orbital Cannons which are more than capable of tearing a ship's hull. Valkaryians are not able to see through the visible spectrum of light as their eyes are evolved to detect Ultraviolet wavelengths. While putting them at a major advantage in identifying Human targets, they are not able to see through water as it appears opaque under UV wavelengths. Furthermore, the introduction of a new Kevlar-Nylon based uniform into the Human armies, renders it harder for the Valkaryians to spot Human targets due to their black/white camouflage.