Piñones - March 28, 2025 - Explains all the invasions

I believe this is the first 18-letter puzzle I've posted, so best of luck to everyone and feel free to tackle this with a friend!!

Instructions (best on desktop):

1. Solve the grid using the clues provided. The direction of the word is indicated by the number around the grid (so some words are backwards).
2. After you complete the grid, click the pencil icon tab at the bottom to switch over to solve the anagram. The title is a hint to the anagram!