Escalation
es*ca*la*tion
/ˌeskəˈlāSH(ə)n/
noun
a rapid increase; a rise.
“cost escalations”
synonyms: increase, rise, hike, growth, leap, upsurge, upturn, climb More
an increase in the intensity or seriousness of something; an intensification.
“an escalation of violence”

Unverified footage claims to show #Russia deployment of two T-50 #PAKFA prototype aircraft to #Syria pic.twitter.com/cvDHwui5ut

— Joseph Dempsey (@JosephHDempsey) February 21, 2018