Question

America was changing but it will take time:

Harlem HellFighters were turned over the
forces.

Moving into the 25st Century:

Changes come into Texas. Biggest issue today is the crisis at the border.

and many have died.

to fight with the French

It is dangerous to cross the

Answer 1

Do you want this cleaned up into a single paragraph, expanded into a longer piece, or turned into a historical-to-present narrative or a speculative future story? Also, did you mean "25th century" or "21st century"?

Here are two quick polished versions based on likely intent — pick the one you want me to expand or revise.

1) Historical-to-present (concise)
America was changing, but progress took time. In World War I the African American 369th Infantry Regiment—the Harlem Hellfighters—was placed under French command and bravely fought with the French. Moving into the 21st century, change continued unevenly: in Texas and other border states the largest challenge has been the border crisis, and many people have died attempting the dangerous crossing.

2) Speculative future (25th century)
America was changing, but progress took time. The legacy of units like the Harlem Hellfighters—who were turned over to French command in World War I to be allowed to fight—remained part of the national memory. Moving into the 25th century, sweeping changes had reached Texas; old disputes over borders and migration had become a long-term crisis, and countless people had died trying to cross what had become a perilous divide.

Tell me which direction you want (historical/analytical, creative/speculative, longer essay), and whether you meant 21st or 25th century.