American theaters of WW2?

Sometimes yes, sometimes no.

There were no substantial units of Marines in the ETO, for instance. Whether from the east or the west, Marines went to the Pacific.

Some army units were the old army, but a substantial number of others were nationalized National Guard units. One division that fought in Italy was largely made up of Texans, for instance, and another was largely made up of Oklahomans.

It didn't matter where one comes from. In the Philippines, where I live, the American army was pulled out, at the start of WW2 and went to Germany to fight the Nazis.The 2 strategic provinces, Bataan and Corregidor, where the Americans camped, were invaded by the Japanese and had their fall.

However, the US Army General Douglas MacArthur, promised to return to the Philippines. His famous words, as is today remembered, were "I SHALL RETURN"!

After the victory in Germany, he indeed came back to the Philippines and defeated the Japanese who took over, when he left and, the Philippines was liberated.Freedom was attained.

Where the soldiers come from, didn't matter.They were sent to where they were needed and the priorities were set to countries, where more enemies infiltrated and were a threat to world peace.

Absolutely not. Let's look at Band of Brothers, which is based on Company E, 506th PIR, 101st Airborne Division. Easy Company was part of the forces that jumped into Normandy on D-Day and it fought in the Netherlands during Operation Market Garden before going on to be among the units surrounded at Bastogne during the Bulge. Major Richard Winters came from Pennsylvania, same for Staff Sergeant Joe Toye and Staff Sergeant William Guarnere. And Sergeant Warren Muck came from New York. Catain Ronald Spiers was actually an immigrant who had been born in Scotland and come to the US when he was four. His family settled in Mass. So just looking at these five men you'd expect the European Theater if where you were from determined your theater of operations. BUT Technical Sergeant Donald Malarkey was from Oregon. Staff Sergean Denver Randallman was from Arkansas. First Lt. Carwood Lipton was from North Carolina. Technician Fourth Grade Eugene Roe was from Louisiana. Captain Herbert Sobel was from Illinois. Staff Sergeant Darrell Powers was from Virginia. Technician Fifth Grade Joe Liebgott came from Michigan. First Lt. Lynn Compton was from California. If you look at the roster of the company you're all over the country, which was actually common place. It did not matter where you were from as to what theater you served in.

None at all.

People from California fought in Europe, people in NY fought in the Pacific... and vice versa.

It didn't so much depend on location as it did what branch one joined [eg the USMC more likely to be sent to the Pacific than say an Army paratrooper] and who was needed where most at the time the unit's training was finished.

No different in Canada, many from Vancouver fought in Europe and it was the Winnipeg Grenadiers that served at say Hong Kong... where you went depended on where you were needed, not where you were from.

I don't believe it made a difference. I think mostly Japanese regiments from Hawaii served in the invasion of Italy, which actually made sense, come to think of it, since you didn't want a conflict of interest.

I know of 3 uncles (from the bronx) who fought in WWII. One fought in france & germany (and was wounded twice), another in the Pacific, and the 3rd kept in the US.

I don't think it mattered. I know there were northeasterners and those from the mid-Atlantic states in the ETO and in the Pacific.

I don't think it matter, Like Audry Murphy was from Texas and fought in Africa, Italy and France

They sent you where they thought they needed you most at the time.