_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
_June 21 Official statement that American forces hold 39 miles of French front in six sectors._
June 27 British hospital ship "Llandovery Castle" is torpedoed off Irish coast with loss of 234 lives. Only 24 survived.
July 10 Italians and French take Berat in Albania.
July 13 Czecho-Slovak troops occupy Irkutsk in Siberia.
_July 15-18 Anglo-American forces occupy strategic positions on the Murman Coast in northwestern Russia._
July 15-18 Fifth German drive extends three miles south of the Marne, but east of Rheims makes no gain.
July 16 Ex-Czar Nicholas executed by Bolshevik authorities.
July 18- Second battle of the Marne, beginning with Foch"s Aug. 4 counter-offensive between Soissons and Chateau-Thierry. French _and Americans_ drive the Germans back from the Marne nearly to the Aisne.
July 22 Honduras declares war on Germany.
_July 27 American troops arrive on the Italian front._
_July 31 President Wilson takes over telegraph and telephone systems._
Aug. 2 Allies occupy Archangel, in northern Russia.
Aug. 8- Allies attack successfully near Montdidier, and continue the Sept. drive until the Germans are back at the Hindenburg line, giving up practically all the ground they had gained this year.
_Aug. 15 American troops land in eastern Siberia._
_Sept. 3 The United States recognizes the Czecho-Slovak government._
_Sept. 12-13 Americans take the St. Mihiel salient near Metz._
Sept. 15 Allied army under Gen. D"Esperey begins campaign against Bulgarians.
_Sept. 16 President Wilson receives an Austrian proposal for a peace conference, and refuses it._
Sept. 22 Great victory of British and Arabs over Turks in Palestine.
_Sept. 26 Americans begin a drive in the Meuse valley._
Sept. 30 Bulgaria withdraws from the war.
Oct. 1 St. Quentin (on the Hindenburg line) taken by the French.
Oct. 1 Damascus captured by the British.
Oct. 3 King Ferdinand of Bulgaria abdicates.
Oct. 3 Lens taken by the British.
_Oct. 4 Germany asks President Wilson for an armistice and peace negotiations_ (page 150); _other notes Oct. 12, 20, etc.; similar notes from Austria-Hungary Oct. 7, and from Turkey Oct. 12. Wilson"s replies Oct. 8, 14, 18, 23._