The phrase "recent invasion" refers to a situation where someone or something has entered a place or a territory without permission or against the wishes of the people living there, and this event has happened quite recently. Full definition
To attribute her observed dissolution to anthropogenic CO2, Bednarsek argued recent invasions of anthropogenic CO2 into the surface water had lowered its surface pH to such an extent, mixing no longer counteracted the low pH of upwelled water. (landscapesandcycles.net)
Indeed, in the leveling of «North» and «South» following the most recent invasion of the South by the North as the new «land of industry» there develop «schools» devoted to removing «Southern» accents from employees. (firstthings.com)
This mistrust is often linked to vivid memories of the Crusades, Sykes - Pico, the Suez Crisis in 1956, and the more recent invasion of Iraq in 2003. (blog.politics.ox.ac.uk)