Feb. 18- Russo-German armistice declared at an end by Germany; Mar. 3 war resumed. Germans occupy Dvinsk, Minsk, and other cities. Feb. 21 German troops land in Finland. Feb. 23 Turkish troops drive back the Russians in the northeast (Trebizond taken Feb. 26, Erzerum March 14). Mar. 2 German and Ukrainian troops defeat the Bolsheviki near Kief in Ukrainia. Mar. 3 Bolsheviki sign peace treaty with Germany at Brest-Litovsk. Ratified by Soviet Congress at Moscow March 15. Mar. 7 Finland and Germany sign a treaty of peace. _Mar. 10 Announcement that American troops are occupying trenches at four different points on French front._ _Mar. 11 First wholly American raid, made in sector north of Toul, meets with success._ Mar. 11 Great German air raid on Paris, by more than fifty planes. Mar. 13 German troops occupy Odessa on Black Sea. Mar. 21- First German drive of the year, on 50-mile front, extending Apr. 1 to Montdidier (page 143). Apr. 9-18 Second German drive, on a 30-mile front between Ypres and Arras. May 6 Roumania signs peace treaty with the Central Powers. May 7 Nicaragua declares war on Germany and her allies. May 9-10 British naval force attempts to block Ostend harbor. May 14 Caucasus proclaims itself an independent state; but the Turks overrun the southern part, and take Baku Sept. 19. May 21 British transport "Moldavia" is sunk _with loss of 53 American soldiers._ _May 24 Major General March appointed Chief of Staff with the rank of General._ May 24 Costa Rica declares war on the Central Powers. _May 25- German submarines appear off American coast and sink 19 June coastwise vessels, including Porto Rico liner "Carolina" with loss of 16 lives._ May 27- Third German drive, capturing the Chemin des Dames and June 1 reaching the Marne River east of Chateau-Thierry. _American Marines aid French at Chateau-Thierry._ _May 28 American forces near Montdidier capture Tillage of Cantigny and hold it against numerous counter-attacks._ _May 31 U.S. transport "President Lincoln" sunk by U-boat while on her way to the United States; 23 lives lost_. June 9-16 Fourth German drive, on 20-mile front east of Montdidier, makes only small gains. June 10 Italian naval forces sink one Austrian dreadnaught and damage another in the Adriatic. _June 11 American Marines take Belleau Wood, with 800 prisoners._ June 14 Turkish troops occupy Tabriz, Persia. _June 15 General March announces that there are 800,000 American troops in France._ June 15- Austrian offensive against Italy fails with heavy losses. July 6