In this photo taken on Jan. 2, 2025 and provided by Ukraine's 24th Mechanised Brigade press service on Monday, Jan. 6, 2025, servicemen leave a shelter on the front line near Chasiv Yar town, in Donetsk region, Ukraine. (Oleg Petrasiuk/Ukraine's 24th Mechanised Brigade via AP)

In this photo taken on Jan. 2, 2025 and provided by Ukraine's 24th Mechanised Brigade press service on Monday, Jan. 6, 2025, servicemen have a short rest in a shelter on the front line near Chasiv Yar town, in Donetsk region, Ukraine. (Oleg Petrasiuk/Ukraine's 24th Mechanised Brigade via AP)

In this photo taken on Jan. 2, 2025 and provided by Ukraine's 24th Mechanised Brigade press service on Monday, Jan. 6, 2025, servicemen talk in a shelter on the front line near Chasiv Yar town, in Donetsk region, Ukraine. (Oleg Petrasiuk/Ukraine's 24th Mechanised Brigade via AP)

In this photo taken on Jan. 2, 2025 and provided by Ukraine's 24th Mechanised Brigade press service on Monday, Jan. 6, 2025, servicemen have a short rest in a shelter on the front line near Chasiv Yar town, in Donetsk region, Ukraine. (Oleg Petrasiuk/Ukraine's 24th Mechanised Brigade via AP)

In this photo taken on Jan. 2, 2025 and provided by Ukraine's 24th Mechanised Brigade press service on Monday, Jan. 6, 2025, servicemen have a short rest in a shelter on the front line near Chasiv Yar town, in Donetsk region, Ukraine. (Oleg Petrasiuk/Ukraine's 24th Mechanised Brigade via AP)

In this photo taken on Jan. 2, 2025 and provided by Ukraine's 24th Mechanised Brigade press service on Monday, Jan. 6, 2025, servicemen have a short rest in a shelter on the front line near Chasiv Yar town, in Donetsk region, Ukraine. (Oleg Petrasiuk/Ukraine's 24th Mechanised Brigade via AP)