her under strain, and in 1912, while visiting England with her mother, she suffered a nervous breakdown. Tsarina Alexandra was also unwell with fatigue, concerned by the poor health of her hemophiliac son, Alexei. Olga stood in for the Tsarina at public events and accompanied her brother on a tour of the interior, while the Tsarina remained at home. War and revolution On 1 August 1914, with World War I looming, Olga's regiment, the Akhtyrsky Hussars, appeared at an Imperial Review before her and the Tsar at Krasnoe Selo. Kulikovsky volunteered for service with the Hussars, who were stationed on the frontlines in Southwestern Russia. With the Grand Duchess's prior medical knowledge from the village of Olgino, she started work as a nurse at an under-staffed Red Cross hospital in Rovno, near to where her own regiment was stationed. During the war, she came under heavy Austrian fire while attending the regiment at the front. Nurses rarely worked so close to the frontline and consequently, she was awarded the Order of St. George by General Mannerheim, who later became President of Finland. As the Russians lost ground to the Central Powers, Olga's hospital was moved eastwards to Kiev, and Michael returned to Russia from exile abroad. In 1916, Tsar Nicholas II annulled the marriage between Duke Peter Alexandrovich and the Grand Duchess, allowing her to marry Colonel Kulikovsky. The service was performed on 16 November 1916 in the Kievo-Vasilievskaya Church on Triokhsviatitelskaya (Three Saints Street) in Kiev. The only guests were the Dowager Empress, Olga's brother-in-law Grand Duke Alexander, four officers of the Akhtyrsky Regiment, and two of Olga's fellow nurses from the hospital in Kiev. During the war, internal tensions and economic deprivation in Russia continued to mount and revolutionary sympathies grew. After Tsar Nicholas II abdicated in early 1917, many members of the Romanov dynasty, including Nicholas and his immediate family, were detained under house arrest. In search of safety, the Dowager Empress, Grand Duke Alexander, and Grand Duchess Olga travelled to Crimea by special train, where they were joined by Olga's sister (Alexander's wife) Grand Duchess Xenia. They lived at Alexander's estate, Ay-Todor, about 12 miles (19 km) from Yalta, where they were placed under house arrest by the local forces. On 12 August 1917, her first child and son, Tikhon Nikolaevich was born during their virtual imprisonment. He was named after Tikhon of Zadonsk, the Saint