Ukraine began its fourth year of all-out war with Russia on Monday, hosting a slew of European and world leaders for a summit, but unsure it could rely any longer on its staunchest ally, the United States.

Ukraine enters the fourth year of all-out war with Russia on Monday, unsure it can rely any longer on its staunchest ally the United States as its exhausted troops fight to hold their ground against unrelenting enemy advances.

In a war dominated by the unexpected, few imagined Ukraine’s fourth year at war would so firmly now question the security of all of Europe.