Chinese ships staged a rare "invasion" of Ayungin or Second Thomas Shoal in the West Philippine Sea in a "calculated show of force by Beijing," after disrupting a Philippine resupply mission in the same waters over the weekend, according to a maritime security expert. As many as 11 Chinese maritime militia vessels were observed in the Philippine-held shoal while dozens more clustered in the periphery on Monday, a day after the tension-filled supply run, said Ray Powell, SeaLight director at the Gordian Knot Center for National Security Innovation, citing satellite images by Planet Labs. "This highly unusual invasion of the shoal's interior appears to have been a calculated show...Keep on reading: Chinese vessels at Ayungin seen in ‘invasion’ mode