There seems to be an incursion coming our way, sir.

We must stop this incursion at once!

Incursion maybe/is non-permanent; invasion is more likely permanent

The noun "incursion" means an illegal or unauthorized entrance (potentially an invasion or attack) by a foreign force into sovereign territory, or territory claimed as sovereign. Two prepositions that are often seen following this noun are "by" (the entity or persons making the incursion) and "into" (the location where the incursion occurs).

The cast of Incursion - 2013 includes: Sophia Freeman as Sophia Zuqiang Peng as Zack Andrius Svilys as Andrius

Attack, assault, invasion and incursion