jjchan9

Joined Jul 2012·Last battle about 17 hours ago·Updated just now · Refreshing...

jjchan9's overall stats

Stat	Total		Last 24h		Last 7d		Last 30d
Battles	17,749		22		66		—
Tier	6.52		10.80		9.48		—
Wins	8,895	50.12%	13	59.09%	32	48.48%	—
Losses	8,601	48.46%	7	31.82%	32	48.48%	—
Draws	253	1.43%	2	9.09%	2	3.03%	—
Battles survived	3,524	19.85%	10	45.45%	17	25.76%	—
Tanks destroyed	13,930	0.78	36	1.64	71	1.08	—
Destruction ratio	0.98		3.00		1.45		—
Tanks spotted	20,188	1.14	14	0.64	39	0.59	—
Damages	925.74		3,618.27		2,796.00		—
Track damages	34.29		306.13		41.04		—
Spotting damages	180.02		205.13		319.26		—
Assisting damages	214.31		511.27		360.30		—
Combined damages	1,140.05		4,152.67		2,688.26		—
Base capture	19,078	1.07	0	0.00	0	0.00	—
Base defense	7,710	0.43	63	2.86	63	0.95	—
Experience	485.91		1,116.86		885.38		—
Hit rate	60.11%		82.29%		74.64%		—
Personal rating	5,375		+11		+14		—
World of Tanks Rating	5,910		+8		+6		—
WN7	1,086.86		1,973.36		1,465.46		—
WN8	1,313.13		3,040.19		1,791.68		—
WNX	1,153.86		2,636.89		1,713.93		—

jjchan9's WNX progression

Solid line is overall WNX (matches the Total column above), drifting slowly as new battles accumulate. Dashed line is per-session WNX, computed from the battles played since the previous snapshot. It shows hot and cold streaks. Line color follows the rating tier.

Tanks shaping jjchan9's rating

🚀 Lifting the ratingWNX

Tanks that prop the overall up — dropping them would lower the rating.

T110E5
Tier X· 232 battles
2,611.73−27.23 if removed
Bat.-Châtillon 25 t
Tier X· 266 battles
1,974.71−19.47 if removed
Jagdpanzer E 100
Tier X· 273 battles
1,847.72−16.41 if removed
SU-122-44
Tier VII· 345 battles
1,536.40−8.05 if removed
Vz. 55
Tier X· 139 battles
1,730.12−7.87 if removed

⚓ Dragging the ratingWNX

Tanks that weigh the overall down — dropping them would raise the rating.

Type 62
Tier VII· 630 battles
453.02+25.86 if removed
VK 30.01 (P)
Tier VI· 308 battles
248.40+16.42 if removed
Jagdpanzer IV
Tier VI· 270 battles
214.16+14.68 if removed
Jagdpanther
Tier VII· 304 battles
549.18+10.95 if removed
StuG III Ausf. G
Tier V· 208 battles
187.66+9.31 if removed

jjchan9's tanks (346)


VII	Type 62		630	451	462	49.37%	453.02
VIII	JPanther II		468	1,039	445	49.57%	1,044.39
V	AMX ELC bis		433	451	437	54.73%	958.14
IX	Jagdtiger		381	1,455	451	47.77%	1,216.79
VIII	FCM 50 t		380	1,130	515	44.47%	1,294.47
VII	SU-122-44		345	1,072	550	55.94%	1,536.40
II	T3 HMC		330	206	249	52.73%	674.38
VI	VK 30.01 P		308	385	279	47.08%	248.40
VII	JPanther		304	637	350	46.71%	549.18
X	Jg.Pz. E 100		273	2,198	642	48.72%	1,847.72
VI	Jg.Pz. IV		270	339	226	42.96%	214.16
X	B-C 25 t		266	2,223	778	56.02%	1,974.71
X	AMX 50 B		252	1,936	700	50.40%	1,307.21
VIII	IS-3		233	1,146	580	48.50%	1,272.91
X	T110E5		232	2,772	935	50.86%	2,611.73
IV	Hetzer		226	249	219	52.21%	334.19
V	StuG III G		208	240	181	44.71%	187.66
VI	KV-85		201	642	398	49.75%	868.37
VI	ARL 44		190	644	391	54.74%	946.71
VIII	T26E4		187	820	557	48.66%	599.29
II	T2 Light		184	142	249	52.72%	181.16
VII	IS		178	888	447	52.81%	1,035.55
VI	Hellcat		176	582	336	50.57%	784.37
VIII	T-34-3		176	1,323	749	53.98%	1,549.45
VI	AMX 12 t		164	320	359	45.73%	309.71
V	M4 Sherman		158	396	361	56.33%	707.71
VI	AMX 13 F3		156	549	298	50.64%	869.14
VI	KV-2		153	776	484	46.41%	1,160.48
X	Obj. 277		151	1,953	713	47.68%	1,555.37
V	KV-1		150	459	333	53.33%	592.20
V	Pz. IV H		150	210	216	50.67%	141.76
IX	Centurion 7/1		141	1,791	809	54.61%	1,827.64
X	Vz. 55		139	2,374	795	54.68%	1,730.12
IX	T-10		138	1,673	750	48.55%	1,615.39
VIII	IS-3A		132	1,683	867	52.27%	1,967.70
VIII	Renegade		128	1,571	834	55.47%	1,762.76
VIII	Obj. 252U		123	1,613	791	52.85%	1,810.60
III	Pz. I C		120	168	281	42.50%	247.58
VI	Crusader		119	246	226	37.82%	128.49
VI	M4A3E2		117	657	451	46.15%	1,197.28
V	AMX 13 AM		114	319	203	45.61%	481.36
V	Excelsior		114	467	381	57.02%	789.26
III	M2 Medium		113	139	170	42.48%	70.80
V	S35 CA		110	444	293	52.73%	825.90
V	SU-85		109	348	236	41.28%	494.35
V	Wolverine		108	356	254	50.00%	490.18
V	Churchill III		103	619	674	51.46%	1,192.89
IV	Pz. B2		100	418	433	58.00%	879.17
III	T-46		97	159	210	56.70%	203.00
III	Pz. II J		97	545	717	65.98%	1,636.54
X	DBV-152		95	2,375	649	50.53%	1,798.80
VIII	AMX 50 100		93	1,082	598	46.24%	1,011.95
X	Obj. 430U		93	2,024	766	53.76%	1,752.41
IX	Conqueror		92	2,184	859	57.61%	2,319.80
IX	AMX 50 120		91	1,492	741	56.04%	1,196.07
IX	AMX 13 90		91	865	625	47.25%	928.63
IV	M3 Lee		90	130	140	40.00%	39.65
VIII	Škoda T 56		89	1,745	762	55.06%	1,820.20
X	IS-7		88	2,329	815	50.00%	1,996.65
IV	T-28		86	104	150	46.51%	25.72
V	Bishop		86	391	252	44.19%	749.10
V	Pz. V/IV		86	1,202	945	59.30%	3,288.50
IV	T40		85	207	193	51.76%	200.07
VIII	Somua SM		85	1,672	745	54.12%	1,767.32
X	Stinger		85	2,531	923	57.65%	1,925.16
IV	Pz. 38 nA		83	136	186	44.58%	52.11
VII	Tiger (P)		83	628	377	42.17%	588.92
IX	Obj. 430		78	1,961	831	55.13%	2,077.56
VII	IS-2		77	1,440	796	58.44%	2,110.43
VIII	Tiger II		76	1,175	619	46.05%	1,010.87
III	Marder II		76	122	148	55.26%	35.71
X	FV215b 183		76	1,910	635	42.11%	1,458.17
X	Obj. 268/4		75	2,050	726	50.67%	1,656.57
V	Pz. III/IV		74	211	230	40.54%	139.34
VI	ARL V39		70	449	271	45.71%	552.83
X	Leopard 1		69	1,897	658	40.58%	1,563.11
VII	SU-152		66	1,206	632	57.58%	1,725.25
VI	M44		66	1,101	630	59.09%	2,491.29
IV	Luchs		64	467	438	53.13%	1,267.10
V	AT 2		64	406	387	60.94%	785.49
III	Lorr. 39L AM		62	212	159	32.26%	614.48
II	Pz. II		61	194	236	45.90%	224.17
V	Covenanter		61	168	220	44.26%	67.36
IV	Matilda		57	211	256	56.14%	150.89
IV	SU-85B		56	238	203	53.57%	306.89
IX	AMX M4 51		56	2,416	1,053	60.71%	2,654.74
II	BT-2		55	72	131	45.45%	18.60
II	H35		55	113	181	45.45%	76.47
VIII	T-54 mod. 1		53	992	684	47.17%	1,044.35
VIII	Bourrasque		53	1,547	748	45.28%	1,658.24
IV	BT-7		50	46	85	40.00%	1.69
V	A-20		50	115	207	62.00%	50.25
IX	Obj. 257		50	1,643	739	46.00%	1,613.99
VIII	XM57		50	1,806	854	56.00%	1,766.11
VI	Cromwell		49	527	452	53.06%	725.27
VII	T29		49	1,247	778	53.06%	1,574.56
VIII	WZ-111		48	1,120	648	39.58%	1,115.36
IV	Birch Gun		48	240	178	45.83%	611.77
VIII	AMX AC 48		48	659	456	35.42%	431.50
IV	M5 Stuart		47	107	195	51.06%	32.94
IV	SAu 40		47	275	255	59.57%	508.31
VIII	IS-6		46	1,291	711	45.65%	1,453.90
III	Pz. S35		46	439	460	54.35%	793.10
X	Centurion AX		45	1,912	651	40.00%	1,618.37
VIII	M4A1 Rev.		45	966	578	42.22%	905.33
IV	AMX 40		43	174	236	62.79%	93.09
VIII	53TP		43	1,687	808	48.84%	2,062.69
VII	AMX 13 75		43	590	460	32.56%	762.43
VII	SU-100M1		43	1,217	850	69.77%	2,230.58
VIII	KV-5		42	1,350	761	57.14%	1,692.42
IX	T30		40	1,581	629	60.00%	1,283.54
IV	SU-76M		40	149	151	55.00%	90.13
II	Cruiser II		40	174	214	50.00%	294.12
IV	Pz. III J		39	103	203	66.67%	29.58
II	T1E6		39	149	256	61.54%	132.15
III	SU-26		38	203	146	47.37%	547.25
IX	E 75		38	1,980	823	50.00%	1,740.23
VIII	Rhm.-B. WT		38	1,358	491	52.63%	1,471.57
III	Pz. III E		37	66	119	40.54%	7.26
IX	B-C 25 t AP		37	1,307	681	51.35%	1,020.73
X	E 100		37	2,350	877	56.76%	1,850.95
VI	FV304		37	597	355	48.65%	987.32
III	D2		36	60	113	44.44%	6.42
II	T1 HMC		36	86	94	36.11%	381.79
VII	AMX M4 45		36	637	359	38.89%	441.54
III	M3 Light		36	66	125	38.89%	23.90
IX	TNH T Vz. 51		35	1,717	812	45.71%	1,611.57
VIII	FV4202		35	1,065	691	48.57%	1,113.52
VI	Rudy U.S.S.R.		35	869	645	48.57%	1,596.44
IV	Ke-Ho		34	247	248	50.00%	333.60
VI	VK 30.01 D		34	476	424	55.88%	488.05
III	Bison		33	148	140	48.48%	301.85
VIII	T32		33	1,626	992	63.64%	2,009.83
IV	Cruiser IV		33	517	437	45.45%	1,198.71
IV	Alecto		33	247	320	60.61%	298.06
IX	Obj. 752		33	2,237	831	36.36%	2,246.96
IX	50TP		32	2,193	739	46.88%	1,944.93
III	T56 GMC		32	89	127	46.88%	25.12
X	S. Conqueror		32	1,744	623	34.38%	1,089.81
V	Chi-Nu		31	389	388	67.74%	755.65
VIII	T34		31	1,196	592	41.94%	1,168.55
II	SU-18		31	127	115	48.39%	656.77
IX	M103		31	1,833	889	51.61%	1,553.42
VII	Leo		30	1,153	825	56.67%	2,008.18
VIII	SU-101		30	1,203	619	46.67%	1,440.87
III	BT-SV		30	271	406	66.67%	601.37
VIII	Contradictious		30	1,675	881	56.67%	1,852.85
VI	Strv 74		29	786	595	51.72%	1,260.29
III	Pz. 38 (t)		29	67	129	48.28%	36.14
VIII	TNH 105/1000		29	1,394	819	51.72%	1,511.87
V	BDR G1 B		29	206	171	27.59%	142.34
VII	M12		29	1,005	566	44.83%	1,243.95
VI	Cromwell B		29	829	672	44.83%	1,647.91
IV	T-28E F-30		29	770	520	44.83%	2,051.35
IX	Leopard PT A		28	1,281	533	35.71%	801.01
I	MS-1		27	105	201	51.85%	82.58
IX	UDES 16		27	2,181	923	59.26%	2,272.41
V	Pz.Sfl. IVc		27	176	160	40.74%	98.61
VIII	Löwe		27	1,287	742	62.96%	1,313.93
XI	T803		27	2,852	957	40.74%	2,320.98
IV	B1		26	175	220	38.46%	98.60
VIII	Emil I		26	1,332	695	53.85%	1,301.09
VIII	Centurion I		26	1,105	772	61.54%	1,138.42
VIII	Indien-Pz.		26	824	546	46.15%	699.41
VIII	IS-2-II		26	855	565	65.38%	615.07
IX	Kpz 50 t		26	2,319	923	53.85%	2,190.67
VIII	Mars		26	1,710	709	46.15%	1,942.66
VIII	WZ-120-1 FT		26	1,332	476	42.31%	1,367.14
VI	Škoda T 25		25	892	629	52.00%	1,591.94
II	M2		25	125	204	48.00%	74.87
VII	45TP		25	1,524	839	48.00%	2,245.36
X	60TP		25	1,883	675	56.00%	1,137.27
VIII	Caernarvon		25	868	593	48.00%	704.36
IV	Valentine AT		25	125	174	60.00%	52.78
X	Foch 155		25	2,292	811	68.00%	2,085.43
VII	Challenger		25	1,260	751	68.00%	1,689.86
IX	Obj. 263		25	1,458	752	60.00%	1,254.15
X	CS-63		24	2,121	765	45.83%	1,899.69
V	M7		24	268	264	58.33%	455.00
III	UE 57		24	197	222	66.67%	273.22
VI	Type 64		24	483	462	41.67%	865.54
II	FT BS		23	92	123	65.22%	396.42
VII	Ikv 90 B		23	1,349	741	56.52%	2,009.08
V	leFH18B2		22	777	512	54.55%	1,895.56
V	M41		22	448	351	45.45%	882.01
VII	Lorr. 155 50		22	600	352	59.09%	562.14
V	Chaffee		22	400	494	54.55%	765.35
VI	M4A1 FL 10		22	1,129	795	54.55%	2,329.49
VI	SU-100		21	1,047	672	57.14%	2,124.67
VI	Churchill VII		21	845	705	57.14%	1,353.83
II	T2 Medium		21	45	103	52.38%	5.60
VIII	Ares 75		21	1,549	731	47.62%	1,954.81
VII	AMX 13 57F		21	813	595	28.57%	1,034.34
VI	40TP		20	869	628	45.00%	1,393.05
VI	Ikv 65 II		20	982	598	50.00%	1,749.59
VI	Achilles		20	954	718	65.00%	1,909.84
IV	Marder 38T		19	329	218	36.84%	673.44
V	KV-220-2		19	669	665	57.89%	1,147.97
VIII	Turtle I		19	1,241	722	63.16%	1,004.06
X	121B		19	1,592	590	52.63%	1,339.59
II	D1		18	36	132	66.67%	15.02
VII	Vz. 44-1		18	1,274	951	55.56%	1,811.40
II	T-26		18	77	101	33.33%	23.24
VII	KV-3		18	1,084	788	50.00%	1,399.80
III	Cruiser III		18	323	312	55.56%	706.18
XI	Imbattable		18	4,119	1,152	55.56%	3,014.81
II	Pz.Jäg. I		17	86	123	52.94%	61.44
III	AMX 38		17	115	181	52.94%	45.51
VII	St. Emil		17	1,171	481	52.94%	1,882.28
IX	TL-7		17	1,461	703	47.06%	1,141.76
III	LTP		16	109	156	37.50%	17.35
VIII	M46 KR		16	894	616	43.75%	917.71
VIII	UDES 03		15	723	363	20.00%	602.59
II	FT AC		15	75	86	33.33%	34.53
IX	Terrifiant		15	2,816	961	46.67%	3,454.36
V	T14		14	566	651	71.43%	1,012.50
III	M3 Stuart		14	77	176	50.00%	50.25
II	Pz. 35 (t)		14	96	154	64.29%	50.25
II	AT-1		14	92	109	50.00%	41.92
VI	AT 8		14	438	386	57.14%	347.73
VI	KV-1S		14	1,395	791	57.14%	2,878.60
VIII	59-Patton		14	1,041	662	50.00%	879.80
VI	T-34-85		13	660	531	46.15%	1,020.33
V	Ikv 103		13	714	555	61.54%	1,881.53
VIII	M40/M43		13	882	612	46.15%	521.13
IX	K-91-PT		13	1,682	723	30.77%	1,709.36
VIII	M48 RPz		13	1,252	772	53.85%	1,517.76
IX	Char Futur 4		13	2,441	851	38.46%	2,324.48
VIII	AMX CDC		13	1,062	695	46.15%	1,110.04
VII	SMV CC-56		12	1,327	847	58.33%	2,220.42
X	UDES 15/16		12	1,726	508	25.00%	1,093.66
VI	T-150		12	1,358	901	66.67%	2,749.79
VIII	T28 Prototype		12	1,244	497	50.00%	924.51
II	T7 Car	—	12	73	130	41.67%	8.60
VIII	KanJPz		12	1,014	512	25.00%	780.84
VIII	112		12	1,049	539	16.67%	1,306.50
VII	VK 30.02 D		11	816	689	54.55%	1,063.91
III	Chi-Ha		11	156	164	36.36%	185.97
IV	St.Pz. II		11	129	121	36.36%	146.97
VII	T-43		11	628	558	54.55%	650.08
VI	Nashorn		11	1,041	618	45.45%	1,843.59
X	T-62A		11	1,514	691	63.64%	979.98
VI	AMD 178B		11	274	382	45.45%	398.13
IX	Char Mle. 75		11	968	565	45.45%	1,041.90
III	T-29		11	450	411	72.73%	963.41
VIII	Progetto 46		11	1,654	846	54.55%	1,967.64
III	Medium III		10	80	154	50.00%	50.25
II	UC 2-pdr		10	169	151	40.00%	349.74
VIII	VK 45.02 A		10	1,514	739	30.00%	1,991.81
X	Rhm. Pzw.		10	1,381	775	50.00%	1,830.75
II	Light VIC		10	154	253	80.00%	240.91
V	Churchill I		9	774	576	44.44%	1,557.60
VIII	Lynx 6x6		9	401	399	22.22%	295.30
VIII	VK 100.01 P		9	1,085	530	22.22%	952.62
VI	Škoda T 40		9	857	597	22.22%	1,482.26
VIII	Tornvagn		9	1,776	770	44.44%	1,945.77
VI	SU-100Y		9	646	420	44.44%	799.00
VI	Dicker Max		9	1,124	738	55.56%	2,539.62
VII	Tiger I		8	637	503	37.50%	610.43
III	FCM36Pak40		8	448	423	62.50%	930.30
III	Ke-Ni		8	182	213	50.00%	403.78
III	Sexton II		8	192	179	62.50%	499.87
VIII	UDES 14 5		8	787	649	62.50%	699.19
VII	Gowika		8	941	614	50.00%	1,047.49
VI	VK 30.02 M		8	1,192	859	75.00%	2,367.32
VI	T37		8	337	474	37.50%	512.98
VIII	B-C 12 t	—	8	559	258	25.00%	403.63
II	Tetrarch		8	159	263	50.00%	178.53
VIII	Panther 8,8	—	8	456	360	25.00%	119.21
I	T1		7	17	108	57.14%	2.08
IV	ST vz. 39		7	595	573	57.14%	1,488.27
IV	Lago		7	534	415	57.14%	1,177.51
I	L.Tr.		7	30	54	28.57%	22.08
VII	T25/2		7	672	453	42.86%	601.61
VIII	Charioteer		7	948	578	42.86%	914.03
VIII	703 II (122)		7	1,951	1,103	71.43%	2,472.11
VIII	Jagdtiger Pr		7	1,372	728	42.86%	1,230.88
III	T-127		7	481	468	14.29%	1,167.36
VIII	JgTig.8,8 cm		7	1,230	665	57.14%	1,276.44
VI	Chi-To		6	901	555	66.67%	1,389.47
IV	SU-5	—	6	223	161	50.00%	390.64
VI	59-16	—	6	301	259	16.67%	206.75
VIII	STA-2	—	6	740	337	16.67%	424.14
V	Matilda BP		6	643	401	66.67%	1,117.37
VI	TOG II*		6	843	510	50.00%	1,267.94
III	Strv m/40L		5	440	264	40.00%	993.59
IV	14TP		5	520	407	60.00%	841.79
V	25TP		5	1,435	927	60.00%	5,087.25
IV	M8A1	—	5	82	88	20.00%	10.96
II	Pz. I		5	62	233	80.00%	1.22
II	G.Pz. Mk. VI		5	32	119	60.00%	194.75
VII	AT 15A		5	817	572	40.00%	791.99
III	10TP	—	4	378	316	50.00%	895.29
II	VAE Type B	—	4	144	146	75.00%	98.62
III	Wespe	—	4	7	61	25.00%	2.08
IV	D.W. 2		4	540	376	25.00%	1,020.37
X	WT E 100		4	2,948	791	50.00%	2,139.24
III	T18 HMC		4	221	304	100.00%	619.78
V	SU-2-122		4	523	367	25.00%	705.63
VIII	T-103	—	4	713	541	75.00%	464.60
VI	Strv m/42-57		4	1,390	801	50.00%	2,486.53
VI	HT No. VI	—	4	473	346	25.00%	283.65
II	Pz. II D	—	4	35	230	75.00%	7.73
V	StuG IV		4	606	395	25.00%	1,425.72
III	BT-7 art.		4	486	523	50.00%	1,297.82
VIII	ELC EVEN 90	—	4	289	400	25.00%	365.33
III	Toldi III		4	257	522	75.00%	662.21
VIII	Pz. 58 Mutz	—	4	969	366	0.00%	939.22
V	T-34		3	350	384	100.00%	743.60
I	FT	—	3	42	49	33.33%	0.00
V	Strv m/42		3	1,265	1,047	100.00%	4,841.76
II	Te-Ke	—	3	51	110	66.67%	2.08
V	Pz. IV hydr.		3	674	611	66.67%	1,720.98
VII	Scorpion	—	3	584	405	33.33%	271.51
II	Medium II		2	173	234	50.00%	356.80
II	7TP		2	410	274	0.00%	1,124.10
IV	M5A1 Stuart		2	407	496	100.00%	592.32
I	Cruiser I	—	2	63	89	50.00%	0.63
VII	AMX AC 46	—	2	896	400	0.00%	851.48
II	T-60		2	153	309	50.00%	194.54
VI	MT-25	—	2	43	151	0.00%	2.08
X	AMX M4 54	—	2	1,651	816	50.00%	526.00
VI	VK 28.01 105	—	2	864	358	0.00%	1,946.07
VIII	มังกรขาว	—	2	854	430	0.00%	928.24
VIII	Skorpion G		2	1,603	778	50.00%	1,443.25
VIII	Strv S1	—	2	762	228	0.00%	186.37
X	Ashbringer	—	2	2,117	498	0.00%	971.81
V	Pz. T 25		2	476	609	50.00%	1,168.27
VII	T28 HTC	—	2	739	607	100.00%	579.21
I	Medium I	—	1	58	120	100.00%	4.03
I	K-housenka	—	1	0	14	0.00%	0.00
II	TKS 20		1	984	1,571	100.00%	3,798.62
II	M14/41	—	1	247	194	0.00%	665.07
II	Ha-Go		1	177	310	100.00%	494.35
V	Škoda T 24	—	1	552	467	100.00%	628.23
VIII	T-44	—	1	1,073	450	0.00%	815.49
V	Type T-34		1	1,466	1,335	100.00%	4,788.78
VII	Comet	—	1	883	479	0.00%	1,223.91
V	Ho-Ni III	—	1	257	359	100.00%	80.76
V	T-50	—	1	235	150	0.00%	69.14
II	Loyd GC		1	77	252	100.00%	249.66
VII	BP II	—	1	864	561	0.00%	1,033.19
VI	T-50-2		1	432	843	100.00%	2,156.95
II	T-45	—	1	51	198	100.00%	0.00
VIII	Caliban	—	1	820	498	100.00%	481.18
VII	VK 45.03	—	1	494	222	0.00%	160.46

jjchan9's clans history

No clan history.